From 312faf1706e4eafcb4a07d26ad252b713e4ca238 Mon Sep 17 00:00:00 2001
From: Weston Ruter <westonruter@google.com>
Date: Mon, 25 Nov 2019 17:48:51 -0800
Subject: [PATCH 1/5] Include extension_type in generated tag specs

---
 bin/amphtml-update.py                                    | 4 ----
 includes/sanitizers/class-amp-allowed-tags-generated.php | 1 +
 .../sanitizers/class-amp-tag-and-attribute-sanitizer.php | 9 ++++++---
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/bin/amphtml-update.py b/bin/amphtml-update.py
index 469d744696e..acfb718ca85 100644
--- a/bin/amphtml-update.py
+++ b/bin/amphtml-update.py
@@ -593,10 +593,6 @@ def GetTagRules(tag_spec):
 		versions.remove( 'latest' )
 		extension_spec['version'] = sorted( versions, key=lambda version: map(int, version.split('.') ) )
 
-		# Unused since amp_filter_script_loader_tag() and \AMP_Tag_And_Attribute_Sanitizer::get_rule_spec_list_to_validate() just hard-codes the check for amp-mustache.
-		if 'extension_type' in extension_spec:
-			del extension_spec['extension_type']
-
 		if 'deprecated_version' in extension_spec:
 			del extension_spec['deprecated_version']
 
diff --git a/includes/sanitizers/class-amp-allowed-tags-generated.php b/includes/sanitizers/class-amp-allowed-tags-generated.php
index 65d3e7d65be..974e46c1825 100644
--- a/includes/sanitizers/class-amp-allowed-tags-generated.php
+++ b/includes/sanitizers/class-amp-allowed-tags-generated.php
@@ -13602,6 +13602,7 @@ class AMP_Allowed_Tags_Generated {
 				),
 				'tag_spec' => array(
 					'extension_spec' => array(
+						'extension_type' => 2,
 						'name' => 'amp-mustache',
 						'requires_usage' => true,
 						'version' => array(
diff --git a/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php b/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
index b635d83e4aa..e81c72e0e01 100644
--- a/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
+++ b/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
@@ -380,8 +380,11 @@ private function get_rule_spec_list_to_validate( DOMElement $node, $rule_spec )
 		if ( isset( $rule_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec'] ) ) {
 			$extension_spec = $rule_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec'];
 
-			// This could also be derived from the extension_type in the extension_spec.
-			$custom_attr = 'amp-mustache' === $extension_spec['name'] ? 'custom-template' : 'custom-element';
+			if ( isset( $rule_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec']['extension_type'] ) && 2 === $rule_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec']['extension_type'] ) {
+				$custom_attr = 'custom-template';
+			} else {
+				$custom_attr = 'custom-element';
+			}
 
 			$rule_spec[ AMP_Rule_Spec::ATTR_SPEC_LIST ][ $custom_attr ] = [
 				AMP_Rule_Spec::VALUE     => $extension_spec['name'],
@@ -1056,7 +1059,7 @@ private function get_spec_name( DOMElement $element, $tag_spec ) {
 		} elseif ( isset( $tag_spec['extension_spec']['name'] ) ) {
 			return sprintf(
 				'script[%s=%s]',
-				'amp-mustache' === $tag_spec['extension_spec']['name'] ? 'custom-template' : 'custom-element',
+				isset( $tag_spec['extension_spec']['extension_type'] ) && 2 === $tag_spec['extension_spec']['extension_type'] ? 'custom-template' : 'custom-element',
 				strtolower( $tag_spec['extension_spec']['name'] )
 			);
 		} else {

From 0347568e769b5f1781c4d86672544fd3ab276b81 Mon Sep 17 00:00:00 2001
From: Weston Ruter <westonruter@google.com>
Date: Mon, 25 Nov 2019 19:06:00 -0800
Subject: [PATCH 2/5] Add obtaining a tag spec by name

---
 bin/amphtml-update.py                         |  25 +++-
 .../class-amp-allowed-tags-generated.php      | 132 +++++++++++++++++-
 .../sanitizers/class-amp-style-sanitizer.php  |  24 +---
 tests/php/test-amp-style-sanitizer.php        |   9 ++
 4 files changed, 167 insertions(+), 23 deletions(-)

diff --git a/bin/amphtml-update.py b/bin/amphtml-update.py
index acfb718ca85..743a829f311 100644
--- a/bin/amphtml-update.py
+++ b/bin/amphtml-update.py
@@ -101,6 +101,7 @@ def GeneratePHP(out_dir):
 	expected_spec_names = (
 		'style amp-custom',
 		'style[amp-keyframes]',
+		'link rel=stylesheet for fonts',
 	)
 	for expected_spec_name in expected_spec_names:
 		if expected_spec_name not in seen_spec_names:
@@ -250,12 +251,26 @@ def GenerateFooterPHP(out):
 	 * Get the rules for a single tag so that the entire data structure needn't be passed around.
 	 *
 	 * @since 0.7
-	 * @param string $node_name Tag name.
+	 *
+	 * @param string      $node_name Tag name.
+	 * @param string|null $spec_name Spec name.
 	 * @return array|null Allowed tag, or null if the tag does not exist.
 	 */
-	public static function get_allowed_tag( $node_name ) {
+	public static function get_allowed_tag( $node_name, $spec_name = null ) {
 		if ( isset( self::$allowed_tags[ $node_name ] ) ) {
-			return self::$allowed_tags[ $node_name ];
+			$rule_specs = self::$allowed_tags[ $node_name ];
+			if ( empty( $spec_name ) ) {
+				return $rule_specs;
+			}
+			foreach ( $rule_specs as $rule_spec ) {
+				if (
+					( ! isset( $rule_spec['tag_spec']['spec_name'] ) && $node_name === $spec_name )
+					||
+					( isset( $rule_spec['tag_spec']['spec_name'] ) && $rule_spec['tag_spec']['spec_name'] === $spec_name )
+				) {
+					return $rule_spec;
+				}
+			}
 		}
 		return null;
 	}
@@ -502,6 +517,10 @@ def GetTagSpec(tag_spec, attr_lists):
 			raise Exception( 'Already seen spec_name: %s' % spec_name )
 		seen_spec_names.add( spec_name )
 
+		# Add the spec_name to the tag spec if it isn't the same as the tag name.
+		if spec_name != tag_spec.tag_name.lower():
+			tag_spec_dict['tag_spec']['spec_name'] = spec_name
+
 	return tag_spec_dict
 
 
diff --git a/includes/sanitizers/class-amp-allowed-tags-generated.php b/includes/sanitizers/class-amp-allowed-tags-generated.php
index 974e46c1825..511c474aaaa 100644
--- a/includes/sanitizers/class-amp-allowed-tags-generated.php
+++ b/includes/sanitizers/class-amp-allowed-tags-generated.php
@@ -11554,6 +11554,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-3d-gltf]',
 				),
 			),
 			array(
@@ -11579,6 +11580,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-3q-player]',
 				),
 			),
 			array(
@@ -11608,6 +11610,7 @@ class AMP_Allowed_Tags_Generated {
 					'requires_extension' => array(
 						'amp-access',
 					),
+					'spec_name' => 'script [custom-element=amp-access-laterpay]',
 				),
 			),
 			array(
@@ -11636,6 +11639,7 @@ class AMP_Allowed_Tags_Generated {
 					'requires_extension' => array(
 						'amp-access',
 					),
+					'spec_name' => 'script [custom-element=amp-access-poool]',
 				),
 			),
 			array(
@@ -11664,6 +11668,7 @@ class AMP_Allowed_Tags_Generated {
 					'requires_extension' => array(
 						'amp-access',
 					),
+					'spec_name' => 'script [custom-element=amp-access-scroll]',
 				),
 			),
 			array(
@@ -11689,6 +11694,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-access]',
 				),
 			),
 			array(
@@ -11746,6 +11752,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-accordion]',
 				),
 			),
 			array(
@@ -11771,6 +11778,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-action-macro]',
 				),
 			),
 			array(
@@ -11848,6 +11856,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-addthis]',
 				),
 			),
 			array(
@@ -11873,6 +11882,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-analytics]',
 				),
 			),
 			array(
@@ -11924,6 +11934,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-anim]',
 				),
 			),
 			array(
@@ -11949,6 +11960,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-animation]',
 				),
 			),
 			array(
@@ -11999,6 +12011,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-apester-media]',
 				),
 			),
 			array(
@@ -12024,6 +12037,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-app-banner]',
 				),
 			),
 			array(
@@ -12049,6 +12063,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-audio]',
 				),
 			),
 			array(
@@ -12074,6 +12089,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-auto-ads]',
 				),
 			),
 			array(
@@ -12099,6 +12115,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-autocomplete]',
 				),
 			),
 			array(
@@ -12149,6 +12166,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-base-carousel]',
 				),
 			),
 			array(
@@ -12174,6 +12192,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-beopinion]',
 				),
 			),
 			array(
@@ -12199,6 +12218,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-bind]',
 				),
 			),
 			array(
@@ -12252,6 +12272,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-bodymovin-animation]',
 				),
 			),
 			array(
@@ -12277,6 +12298,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-brid-player]',
 				),
 			),
 			array(
@@ -12302,6 +12324,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-brightcove]',
 				),
 			),
 			array(
@@ -12327,6 +12350,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-byside-content]',
 				),
 			),
 			array(
@@ -12352,6 +12376,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-call-tracking]',
 				),
 			),
 			array(
@@ -12378,6 +12403,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.2',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-carousel]',
 				),
 			),
 			array(
@@ -12403,6 +12429,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-connatix-player]',
 				),
 			),
 			array(
@@ -12428,6 +12455,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-consent]',
 				),
 			),
 			array(
@@ -12479,6 +12507,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-dailymotion]',
 				),
 			),
 			array(
@@ -12504,6 +12533,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-date-countdown]',
 				),
 			),
 			array(
@@ -12529,6 +12559,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-date-display]',
 				),
 			),
 			array(
@@ -12554,6 +12585,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-date-picker]',
 				),
 			),
 			array(
@@ -12579,6 +12611,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-delight-player]',
 				),
 			),
 			array(
@@ -12604,6 +12637,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-dynamic-css-classes]',
 				),
 			),
 			array(
@@ -12629,6 +12663,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-embedly-card]',
 				),
 			),
 			array(
@@ -12655,6 +12690,7 @@ class AMP_Allowed_Tags_Generated {
 							'1.0',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-experiment]',
 				),
 			),
 			array(
@@ -12705,6 +12741,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-facebook-comments]',
 				),
 			),
 			array(
@@ -12730,6 +12767,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-facebook-like]',
 				),
 			),
 			array(
@@ -12755,6 +12793,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-facebook-page]',
 				),
 			),
 			array(
@@ -12780,6 +12819,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-facebook]',
 				),
 			),
 			array(
@@ -12805,6 +12845,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-fit-text]',
 				),
 			),
 			array(
@@ -12830,6 +12871,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-font]',
 				),
 			),
 			array(
@@ -12855,6 +12897,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-form]',
 				),
 			),
 			array(
@@ -12880,6 +12923,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-fx-collection]',
 				),
 			),
 			array(
@@ -12905,6 +12949,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-fx-flying-carpet]',
 				),
 			),
 			array(
@@ -12930,6 +12975,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-geo]',
 				),
 			),
 			array(
@@ -12981,6 +13027,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-gfycat]',
 				),
 			),
 			array(
@@ -13006,6 +13053,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-gist]',
 				),
 			),
 			array(
@@ -13031,6 +13079,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-google-document-embed]',
 				),
 			),
 			array(
@@ -13056,6 +13105,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-hulu]',
 				),
 			),
 			array(
@@ -13081,6 +13131,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-iframe]',
 				),
 			),
 			array(
@@ -13106,6 +13157,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-ima-video]',
 				),
 			),
 			array(
@@ -13131,6 +13183,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-image-lightbox]',
 				),
 			),
 			array(
@@ -13156,6 +13209,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-image-slider]',
 				),
 			),
 			array(
@@ -13181,6 +13235,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-imgur]',
 				),
 			),
 			array(
@@ -13206,6 +13261,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-inputmask]',
 				),
 			),
 			array(
@@ -13231,6 +13287,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-instagram]',
 				),
 			),
 			array(
@@ -13256,6 +13313,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-install-serviceworker]',
 				),
 			),
 			array(
@@ -13281,6 +13339,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-izlesene]',
 				),
 			),
 			array(
@@ -13306,6 +13365,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-jwplayer]',
 				),
 			),
 			array(
@@ -13331,6 +13391,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-kaltura-player]',
 				),
 			),
 			array(
@@ -13356,6 +13417,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-lightbox-gallery]',
 				),
 			),
 			array(
@@ -13381,6 +13443,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-lightbox]',
 				),
 			),
 			array(
@@ -13406,6 +13469,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-link-rewriter]',
 				),
 			),
 			array(
@@ -13456,6 +13520,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-list]',
 				),
 			),
 			array(
@@ -13482,6 +13547,7 @@ class AMP_Allowed_Tags_Generated {
 						),
 					),
 					'mandatory_parent' => 'head',
+					'spec_name' => 'script [custom-element=amp-live-list]',
 					'unique_warning' => true,
 				),
 			),
@@ -13508,6 +13574,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-mathml]',
 				),
 			),
 			array(
@@ -13533,6 +13600,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-megaphone]',
 				),
 			),
 			array(
@@ -13558,6 +13626,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-minute-media-player]',
 				),
 			),
 			array(
@@ -13583,6 +13652,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-mowplayer]',
 				),
 			),
 			array(
@@ -13610,6 +13680,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.2',
 						),
 					),
+					'spec_name' => 'script [custom-template=amp-mustache]',
 				),
 			),
 			array(
@@ -13673,6 +13744,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-next-page]',
 				),
 			),
 			array(
@@ -13717,6 +13789,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-nexxtv-player]',
 				),
 			),
 			array(
@@ -13742,6 +13815,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-o2-player]',
 				),
 			),
 			array(
@@ -13767,6 +13841,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-ooyala-player]',
 				),
 			),
 			array(
@@ -13792,6 +13867,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-orientation-observer]',
 				),
 			),
 			array(
@@ -13817,6 +13893,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-pan-zoom]',
 				),
 			),
 			array(
@@ -13842,6 +13919,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-pinterest]',
 				),
 			),
 			array(
@@ -13867,6 +13945,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-playbuzz]',
 				),
 			),
 			array(
@@ -13892,6 +13971,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-position-observer]',
 				),
 			),
 			array(
@@ -13917,6 +13997,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-powr-player]',
 				),
 			),
 			array(
@@ -13942,6 +14023,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-reach-player]',
 				),
 			),
 			array(
@@ -13967,6 +14049,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-recaptcha-input]',
 				),
 			),
 			array(
@@ -13992,6 +14075,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-reddit]',
 				),
 			),
 			array(
@@ -14017,6 +14101,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-riddle-quiz]',
 				),
 			),
 			array(
@@ -14042,6 +14127,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-script]',
 				),
 			),
 			array(
@@ -14104,6 +14190,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-selector]',
 				),
 			),
 			array(
@@ -14129,6 +14216,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-sidebar]',
 				),
 			),
 			array(
@@ -14154,6 +14242,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-skimlinks]',
 				),
 			),
 			array(
@@ -14179,6 +14268,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-smartlinks]',
 				),
 			),
 			array(
@@ -14204,6 +14294,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-social-share]',
 				),
 			),
 			array(
@@ -14229,6 +14320,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-soundcloud]',
 				),
 			),
 			array(
@@ -14254,6 +14346,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-springboard-player]',
 				),
 			),
 			array(
@@ -14280,6 +14373,7 @@ class AMP_Allowed_Tags_Generated {
 							'1.0',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-sticky-ad]',
 				),
 			),
 			array(
@@ -14305,6 +14399,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-story-auto-ads]',
 				),
 			),
 			array(
@@ -14356,6 +14451,7 @@ class AMP_Allowed_Tags_Generated {
 							'1.0',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-story]',
 				),
 			),
 			array(
@@ -14452,6 +14548,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-subscriptions]',
 				),
 			),
 			array(
@@ -14512,6 +14609,7 @@ class AMP_Allowed_Tags_Generated {
 					'requires_extension' => array(
 						'amp-subscriptions',
 					),
+					'spec_name' => 'script [custom-element=amp-subscriptions-google]',
 				),
 			),
 			array(
@@ -14537,6 +14635,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-timeago]',
 				),
 			),
 			array(
@@ -14562,6 +14661,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-truncate-text]',
 				),
 			),
 			array(
@@ -14587,6 +14687,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-twitter]',
 				),
 			),
 			array(
@@ -14612,6 +14713,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-user-location]',
 				),
 			),
 			array(
@@ -14663,6 +14765,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-user-notification]',
 				),
 			),
 			array(
@@ -14714,6 +14817,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-video-iframe]',
 				),
 			),
 			array(
@@ -14765,6 +14869,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-vimeo]',
 				),
 			),
 			array(
@@ -14790,6 +14895,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-vine]',
 				),
 			),
 			array(
@@ -14815,6 +14921,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-viqeo-player]',
 				),
 			),
 			array(
@@ -14840,6 +14947,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-vk]',
 				),
 			),
 			array(
@@ -14865,6 +14973,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-web-push]',
 				),
 			),
 			array(
@@ -14890,6 +14999,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-wistia-player]',
 				),
 			),
 			array(
@@ -14915,6 +15025,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-yotpo]',
 					'spec_url' => 'https://amp.dev/documentation/components/amp-yotpo',
 				),
 			),
@@ -14941,6 +15052,7 @@ class AMP_Allowed_Tags_Generated {
 							'0.1',
 						),
 					),
+					'spec_name' => 'script [custom-element=amp-youtube]',
 				),
 			),
 		),
@@ -17625,12 +17737,26 @@ public static function get_extension_specs() {
 	 * Get the rules for a single tag so that the entire data structure needn't be passed around.
 	 *
 	 * @since 0.7
-	 * @param string $node_name Tag name.
+	 *
+	 * @param string      $node_name Tag name.
+	 * @param string|null $spec_name Spec name.
 	 * @return array|null Allowed tag, or null if the tag does not exist.
 	 */
-	public static function get_allowed_tag( $node_name ) {
+	public static function get_allowed_tag( $node_name, $spec_name = null ) {
 		if ( isset( self::$allowed_tags[ $node_name ] ) ) {
-			return self::$allowed_tags[ $node_name ];
+			$rule_specs = self::$allowed_tags[ $node_name ];
+			if ( empty( $spec_name ) ) {
+				return $rule_specs;
+			}
+			foreach ( $rule_specs as $rule_spec ) {
+				if (
+					( ! isset( $rule_spec['tag_spec']['spec_name'] ) && $node_name === $spec_name )
+					||
+					( isset( $rule_spec['tag_spec']['spec_name'] ) && $rule_spec['tag_spec']['spec_name'] === $spec_name )
+				) {
+					return $rule_spec;
+				}
+			}
 		}
 		return null;
 	}
diff --git a/includes/sanitizers/class-amp-style-sanitizer.php b/includes/sanitizers/class-amp-style-sanitizer.php
index 9bcc886e3f3..5a05037c2f8 100644
--- a/includes/sanitizers/class-amp-style-sanitizer.php
+++ b/includes/sanitizers/class-amp-style-sanitizer.php
@@ -388,24 +388,14 @@ public static function has_required_php_css_parser() {
 	public function __construct( $dom, array $args = [] ) {
 		parent::__construct( $dom, $args );
 
-		foreach ( AMP_Allowed_Tags_Generated::get_allowed_tag( 'style' ) as $spec_rule ) {
-			if ( ! isset( $spec_rule[ AMP_Rule_Spec::TAG_SPEC ]['spec_name'] ) ) {
-				continue;
-			}
-			if ( self::STYLE_AMP_KEYFRAMES_SPEC_NAME === $spec_rule[ AMP_Rule_Spec::TAG_SPEC ]['spec_name'] ) {
-				$this->style_keyframes_cdata_spec = $spec_rule[ AMP_Rule_Spec::CDATA ];
-			} elseif ( self::STYLE_AMP_CUSTOM_SPEC_NAME === $spec_rule[ AMP_Rule_Spec::TAG_SPEC ]['spec_name'] ) {
-				$this->style_custom_cdata_spec = $spec_rule[ AMP_Rule_Spec::CDATA ];
-			}
-		}
+		$style_custom_rule_spec        = AMP_Allowed_Tags_Generated::get_allowed_tag( 'style', self::STYLE_AMP_CUSTOM_SPEC_NAME );
+		$this->style_custom_cdata_spec = $style_custom_rule_spec[ AMP_Rule_Spec::CDATA ];
 
-		$spec_name = 'link rel=stylesheet for fonts'; // phpcs:ignore WordPress.WP.EnqueuedResources.NonEnqueuedStylesheet
-		foreach ( AMP_Allowed_Tags_Generated::get_allowed_tag( 'link' ) as $spec_rule ) {
-			if ( isset( $spec_rule[ AMP_Rule_Spec::TAG_SPEC ]['spec_name'] ) && $spec_name === $spec_rule[ AMP_Rule_Spec::TAG_SPEC ]['spec_name'] ) {
-				$this->allowed_font_src_regex = '@^(' . $spec_rule[ AMP_Rule_Spec::ATTR_SPEC_LIST ]['href']['value_regex'] . ')$@';
-				break;
-			}
-		}
+		$style_keyframes_rule_spec        = AMP_Allowed_Tags_Generated::get_allowed_tag( 'style', self::STYLE_AMP_KEYFRAMES_SPEC_NAME );
+		$this->style_keyframes_cdata_spec = $style_keyframes_rule_spec[ AMP_Rule_Spec::CDATA ];
+
+		$font_stylesheet_tag_spec     = AMP_Allowed_Tags_Generated::get_allowed_tag( 'link', 'link rel=stylesheet for fonts' ); // phpcs:ignore WordPress.WP.EnqueuedResources.NonEnqueuedStylesheet
+		$this->allowed_font_src_regex = '@^(' . $font_stylesheet_tag_spec[ AMP_Rule_Spec::ATTR_SPEC_LIST ]['href']['value_regex'] . ')$@';
 
 		$guessurl = site_url();
 		if ( ! $guessurl ) {
diff --git a/tests/php/test-amp-style-sanitizer.php b/tests/php/test-amp-style-sanitizer.php
index b22274e443d..99d3543b8f0 100644
--- a/tests/php/test-amp-style-sanitizer.php
+++ b/tests/php/test-amp-style-sanitizer.php
@@ -38,6 +38,15 @@ public function tearDown() {
 		$wp_scripts = null;
 	}
 
+	/**
+	 * Ensure the specs required by the constructor are present.
+	 */
+	public function test_constructor_dependencies() {
+		$this->assertInternalType( 'array', AMP_Allowed_Tags_Generated::get_allowed_tag( 'style', AMP_Style_Sanitizer::STYLE_AMP_CUSTOM_SPEC_NAME )[ AMP_Rule_Spec::CDATA ] );
+		$this->assertInternalType( 'array', AMP_Allowed_Tags_Generated::get_allowed_tag( 'style', AMP_Style_Sanitizer::STYLE_AMP_KEYFRAMES_SPEC_NAME )[ AMP_Rule_Spec::CDATA ] );
+		$this->assertInternalType( 'string', AMP_Allowed_Tags_Generated::get_allowed_tag( 'link', 'link rel=stylesheet for fonts' )[ AMP_Rule_Spec::ATTR_SPEC_LIST ]['href']['value_regex'] ); // phpcs:ignore WordPress.WP.EnqueuedResources.NonEnqueuedStylesheet
+	}
+
 	/**
 	 * Get data for tests.
 	 *

From 5b0dedba85cf0578104c90af3cb7bc9a09c1fcb9 Mon Sep 17 00:00:00 2001
From: Weston Ruter <westonruter@google.com>
Date: Mon, 25 Nov 2019 21:20:45 -0800
Subject: [PATCH 3/5] Separate extension specs from tag specs

---
 bin/amphtml-update.py                         |   76 +-
 .../class-amp-allowed-tags-generated.php      | 8074 ++++++-----------
 .../class-amp-tag-and-attribute-sanitizer.php |  100 +-
 3 files changed, 2976 insertions(+), 5274 deletions(-)

diff --git a/bin/amphtml-update.py b/bin/amphtml-update.py
index 743a829f311..c4b05058537 100644
--- a/bin/amphtml-update.py
+++ b/bin/amphtml-update.py
@@ -96,7 +96,7 @@ def GeneratePHP(out_dir):
 	"""
 	logging.info('entering ...')
 
-	allowed_tags, attr_lists, descendant_lists, reference_points, versions = ParseRules(out_dir)
+	allowed_tags, extension_specs, attr_lists, descendant_lists, reference_points, versions = ParseRules(out_dir)
 
 	expected_spec_names = (
 		'style amp-custom',
@@ -116,6 +116,7 @@ def GeneratePHP(out_dir):
 	GenerateLayoutAttributesPHP(out, attr_lists)
 	GenerateGlobalAttributesPHP(out, attr_lists)
 	GenerateReferencePointsPHP(out, reference_points)
+	GenerateExtensionSpecsPHP(out, extension_specs)
 	GenerateFooterPHP(out)
 
 	# join out array into a single string and remove unneeded whitespace
@@ -207,6 +208,15 @@ def GenerateReferencePointsPHP(out, reference_points):
 	out.append('')
 	logging.info('... done')
 
+def GenerateExtensionSpecsPHP(out, extension_specs):
+	logging.info('entering ...')
+
+	# Output the reference points.
+	out.append('')
+	out.append('\tprivate static $extension_specs = %s;' % Phpize( extension_specs, 1 ).lstrip() )
+	out.append('')
+	logging.info('... done')
+
 def GenerateFooterPHP(out):
 	logging.info('entering ...')
 
@@ -227,22 +237,27 @@ def GenerateFooterPHP(out):
 	 *
 	 * @since 1.5
 	 * @internal
+	 *
 	 * @return array Extension specs, keyed by extension name.
 	 */
 	public static function get_extension_specs() {
-		static $extension_specs = [];
-
-		if ( ! empty( $extension_specs ) ) {
-			return $extension_specs;
-		}
+		return self::$extension_specs;
+	}
 
-		foreach ( self::get_allowed_tag( 'script' ) as $script_spec ) {
-			if ( isset( $script_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec'] ) ) {
-				$extension_specs[ $script_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec']['name'] ] = $script_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec'];
-			}
+	/**
+	 * Get extension specs.
+	 *
+	 * @since 1.5
+	 * @internal
+	 *
+	 * @param string $name Extension name.
+	 * @return array Extension specs, keyed by extension name.
+	 */
+	public static function get_extension_spec( $name ) {
+		if ( isset( self::$extension_specs[ $name ] ) ) {
+			return self::$extension_specs[ $name ];
 		}
-
-		return $extension_specs;
+		return null;
 	}
 
 	/**
@@ -252,23 +267,23 @@ def GenerateFooterPHP(out):
 	 *
 	 * @since 0.7
 	 *
-	 * @param string      $node_name Tag name.
+	 * @param string      $tag_name  Tag name.
 	 * @param string|null $spec_name Spec name.
-	 * @return array|null Allowed tag, or null if the tag does not exist.
+	 * @return array[]|array|null Allowed tags, allowed tag spec, or null if the tag does not exist.
 	 */
-	public static function get_allowed_tag( $node_name, $spec_name = null ) {
-		if ( isset( self::$allowed_tags[ $node_name ] ) ) {
-			$rule_specs = self::$allowed_tags[ $node_name ];
+	public static function get_allowed_tag( $tag_name, $spec_name = null ) {
+		if ( isset( self::$allowed_tags[ $tag_name ] ) ) {
+			$rule_specs = self::$allowed_tags[ $tag_name ];
 			if ( empty( $spec_name ) ) {
 				return $rule_specs;
 			}
 			foreach ( $rule_specs as $rule_spec ) {
 				if (
-					( ! isset( $rule_spec['tag_spec']['spec_name'] ) && $node_name === $spec_name )
+					( ! isset( $rule_spec['tag_spec']['spec_name'] ) && $tag_name === $spec_name )
 					||
 					( isset( $rule_spec['tag_spec']['spec_name'] ) && $rule_spec['tag_spec']['spec_name'] === $spec_name )
 				) {
-					return $rule_spec;
+					return array_merge( compact( 'tag_name' ), $rule_spec );
 				}
 			}
 		}
@@ -354,6 +369,7 @@ def ParseRules(out_dir):
 	validator_pb2 = imp.load_source('validator_pb2', os.path.join( out_dir, 'validator_pb2.py' ))
 
 	allowed_tags = {}
+	extension_specs = {}
 	attr_lists = {}
 	descendant_lists = {}
 	reference_points = {}
@@ -413,12 +429,16 @@ def ParseRules(out_dir):
 					tag_list = []
 				else:
 					tag_list = allowed_tags[UnicodeEscape(tag_spec.tag_name).lower()]
-				# AddTag(allowed_tags, tag_spec, attr_lists)
 
 				gotten_tag_spec = GetTagSpec(tag_spec, attr_lists)
 				if gotten_tag_spec is not None:
-					tag_list.append(gotten_tag_spec)
-					allowed_tags[UnicodeEscape(tag_spec.tag_name).lower()] = tag_list
+					if 'extension_spec' in gotten_tag_spec['tag_spec']:
+						extension_name = gotten_tag_spec['tag_spec']['extension_spec']['name']
+						del gotten_tag_spec['tag_spec']['extension_spec']['name']
+						extension_specs[ extension_name ] = gotten_tag_spec['tag_spec']['extension_spec']
+					else:
+						tag_list.append(gotten_tag_spec)
+						allowed_tags[UnicodeEscape(tag_spec.tag_name).lower()] = tag_list
 		elif 'descendant_tag_list' == field_desc.name:
 			for list in field_val:
 				descendant_lists[list.name] = []
@@ -431,7 +451,7 @@ def ParseRules(out_dir):
 					descendant_lists[list.name].append( val.lower() )
 
 	logging.info('... done')
-	return allowed_tags, attr_lists, descendant_lists, reference_points, versions
+	return allowed_tags, extension_specs, attr_lists, descendant_lists, reference_points, versions
 
 
 def GetTagSpec(tag_spec, attr_lists):
@@ -504,23 +524,17 @@ def GetTagSpec(tag_spec, attr_lists):
 
 	if 'spec_name' not in tag_spec_dict['tag_spec']:
 		if 'extension_spec' in tag_spec_dict['tag_spec']:
-			# CUSTOM_ELEMENT=1 (default), CUSTOM_TEMPLATE=2
-			extension_type = tag_spec_dict['tag_spec']['extension_spec'].get('extension_type', 1)
-			spec_name = 'script [%s=%s]' % ( 'custom-element' if 1 == extension_type else 'custom-template', tag_spec_dict['tag_spec']['extension_spec']['name'].lower() )
+			extension_name = tag_spec_dict['tag_spec']['extension_spec']['name'].lower()
+			spec_name      = 'script %s' % extension_name
 		else:
 			spec_name = tag_spec.tag_name.lower()
 	else:
 		spec_name = tag_spec_dict['tag_spec']['spec_name']
-
 	if '$reference_point' != spec_name:
 		if spec_name in seen_spec_names:
 			raise Exception( 'Already seen spec_name: %s' % spec_name )
 		seen_spec_names.add( spec_name )
 
-		# Add the spec_name to the tag spec if it isn't the same as the tag name.
-		if spec_name != tag_spec.tag_name.lower():
-			tag_spec_dict['tag_spec']['spec_name'] = spec_name
-
 	return tag_spec_dict
 
 
diff --git a/includes/sanitizers/class-amp-allowed-tags-generated.php b/includes/sanitizers/class-amp-allowed-tags-generated.php
index 511c474aaaa..ba6851ec569 100644
--- a/includes/sanitizers/class-amp-allowed-tags-generated.php
+++ b/includes/sanitizers/class-amp-allowed-tags-generated.php
@@ -11533,181 +11533,171 @@ class AMP_Allowed_Tags_Generated {
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'id' => array(
+						'dispatch_key' => 2,
 						'mandatory' => true,
 						'value' => array(
-							'',
+							'amp-access',
 						),
 					),
 					'nonce' => array(),
 					'type' => array(
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'application/json',
 						),
 					),
 				),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
+					),
+				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-3d-gltf',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'mandatory_parent' => 'head',
+					'requires_extension' => array(
+						'amp-access',
 					),
-					'spec_name' => 'script [custom-element=amp-3d-gltf]',
+					'spec_name' => 'amp-access extension .json script',
+					'unique' => true,
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
 					'nonce' => array(),
 					'type' => array(
+						'dispatch_key' => 3,
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'application/json',
 						),
 					),
 				),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
+					),
+				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-3q-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'mandatory_parent' => 'amp-analytics',
+					'requires_extension' => array(
+						'amp-analytics',
 					),
-					'spec_name' => 'script [custom-element=amp-3q-player]',
+					'spec_name' => 'amp-analytics extension .json script',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-analytics',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
 					'nonce' => array(),
 					'type' => array(
+						'dispatch_key' => 3,
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'application/json',
 						),
 					),
 				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-access-laterpay',
-						'requires_usage' => false,
-						'version' => array(
-							'0.1',
-							'0.2',
-						),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
 					),
+				),
+				'tag_spec' => array(
+					'mandatory_parent' => 'amp-animation',
 					'requires_extension' => array(
-						'amp-access',
+						'amp-animation',
 					),
-					'spec_name' => 'script [custom-element=amp-access-laterpay]',
+					'spec_name' => 'amp-animation extension .json script',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
 					'nonce' => array(),
 					'type' => array(
+						'dispatch_key' => 3,
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'application/json',
 						),
 					),
 				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-access-poool',
-						'requires_usage' => false,
-						'version' => array(
-							'0.1',
-						),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
 					),
+				),
+				'tag_spec' => array(
+					'mandatory_parent' => 'amp-autocomplete',
 					'requires_extension' => array(
-						'amp-access',
+						'amp-autocomplete',
 					),
-					'spec_name' => 'script [custom-element=amp-access-poool]',
+					'spec_name' => 'amp-autocomplete JSON',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
 					'nonce' => array(),
 					'type' => array(
+						'dispatch_key' => 3,
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'application/json',
 						),
 					),
 				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-access-scroll',
-						'requires_usage' => false,
-						'version' => array(
-							'0.1',
-						),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
 					),
+					'max_bytes' => 100000,
+					'max_bytes_spec_url' => 'https://amp.dev/documentation/components/amp-bind#state',
+				),
+				'tag_spec' => array(
+					'mandatory_parent' => 'amp-state',
 					'requires_extension' => array(
-						'amp-access',
+						'amp-bind',
 					),
-					'spec_name' => 'script [custom-element=amp-access-scroll]',
+					'spec_name' => 'amp-bind extension .json script',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-bind',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
 					'nonce' => array(),
 					'type' => array(
+						'dispatch_key' => 3,
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'application/json',
 						),
 					),
 				),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
+					),
+				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-access',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'mandatory_parent' => 'amp-consent',
+					'requires_extension' => array(
+						'amp-consent',
 					),
-					'spec_name' => 'script [custom-element=amp-access]',
+					'spec_name' => 'amp-consent extension .json script',
+					'unique' => true,
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'id' => array(
-						'dispatch_key' => 2,
-						'mandatory' => true,
-						'value' => array(
-							'amp-access',
-						),
-					),
 					'nonce' => array(),
 					'type' => array(
+						'dispatch_key' => 3,
 						'mandatory' => true,
 						'value_casei' => array(
 							'application/json',
@@ -11719,170 +11709,158 @@ class AMP_Allowed_Tags_Generated {
 						'error_message' => 'html comments',
 						'regex' => '<!--',
 					),
+					'max_bytes' => 15000,
+					'max_bytes_spec_url' => 'https://amp.dev/documentation/components/amp-experiment#configuration',
 				),
 				'tag_spec' => array(
-					'mandatory_parent' => 'head',
-					'requires_extension' => array(
-						'amp-access',
-					),
-					'spec_name' => 'amp-access extension .json script',
-					'unique' => true,
+					'mandatory_parent' => 'amp-experiment',
+					'spec_name' => 'amp-experiment extension .json script',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-experiment',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
 					'nonce' => array(),
 					'type' => array(
+						'dispatch_key' => 3,
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'application/json',
 						),
 					),
 				),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
+					),
+				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-accordion',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'mandatory_parent' => 'amp-geo',
+					'requires_extension' => array(
+						'amp-geo',
 					),
-					'spec_name' => 'script [custom-element=amp-accordion]',
+					'spec_name' => 'amp-geo extension .json script',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-geo',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
 					'nonce' => array(),
 					'type' => array(
+						'dispatch_key' => 3,
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'application/json',
 						),
 					),
 				),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
+					),
+				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-action-macro',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'mandatory_parent' => 'amp-link-rewriter',
+					'requires_extension' => array(
+						'amp-link-rewriter',
 					),
-					'spec_name' => 'script [custom-element=amp-action-macro]',
+					'spec_name' => 'amp-link-rewriter extension .json script',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'nonce' => array(),
+					'template' => array(
+						'dispatch_key' => 2,
 						'mandatory' => true,
 						'value' => array(
-							'',
+							'amp-mustache',
 						),
 					),
-					'nonce' => array(),
 					'type' => array(
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'text/plain',
 						),
 					),
 				),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
+					),
+				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-ad-custom',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'disallowed_ancestor' => array(
+						'template',
+						'amp-date-picker',
+						'form div [submit-success][template]',
+						'form div [submit-error][template]',
+						'form div [submitting][template]',
+						'form div [verify-error][template]',
+					),
+					'requires_extension' => array(
+						'amp-mustache',
 					),
-					'spec_name' => 'amp-ad-custom extension .js script',
+					'spec_name' => 'SCRIPT type=text/plain',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
 					'type' => array(
+						'dispatch_key' => 3,
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'application/json',
 						),
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-ad',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'mandatory_parent' => 'amp-next-page',
+					'requires_extension' => array(
+						'amp-next-page',
 					),
-					'spec_name' => 'amp-ad extension .js script',
+					'spec_name' => 'amp-next-page extension .json configuration',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-next-page',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'id' => array(
+						'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|AMP|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|i-amphtml-\\S*|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
+						'mandatory' => true,
+					),
+					'nonce' => array(),
+					'target' => array(
+						'dispatch_key' => 2,
 						'mandatory' => true,
 						'value' => array(
-							'',
+							'amp-script',
 						),
 					),
-					'nonce' => array(),
 					'type' => array(
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'text/plain',
 						),
 					),
 				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-addthis',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-addthis]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
 					),
+					'max_bytes' => 10000,
+					'max_bytes_spec_url' => 'https://amp.dev/documentation/components/amp-script#faq',
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-analytics',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'requires_extension' => array(
+						'amp-script',
 					),
-					'spec_name' => 'script [custom-element=amp-analytics]',
+					'spec_name' => 'amp-script extension local script',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-script',
 				),
 			),
 			array(
@@ -11903,64 +11881,31 @@ class AMP_Allowed_Tags_Generated {
 					),
 				),
 				'tag_spec' => array(
-					'mandatory_parent' => 'amp-analytics',
+					'mandatory_parent' => 'amp-story-auto-ads',
 					'requires_extension' => array(
-						'amp-analytics',
+						'amp-story-auto-ads',
 					),
-					'spec_name' => 'amp-analytics extension .json script',
-					'spec_url' => 'https://amp.dev/documentation/components/amp-analytics',
+					'spec_name' => 'amp-story-auto-ads config script',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-story-auto-ads',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
 					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-anim',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-anim]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
+						'dispatch_key' => 3,
 						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
 						'value_casei' => array(
-							'text/javascript',
+							'application/json',
 						),
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-animation',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'mandatory_parent' => 'amp-story-bookend',
+					'requires_extension' => array(
+						'amp-story',
 					),
-					'spec_name' => 'script [custom-element=amp-animation]',
+					'spec_name' => 'amp-story-bookend extension .json script',
+					'unique' => true,
 				),
 			),
 			array(
@@ -11981,141 +11926,70 @@ class AMP_Allowed_Tags_Generated {
 					),
 				),
 				'tag_spec' => array(
-					'mandatory_parent' => 'amp-animation',
+					'mandatory_parent' => 'amp-story-consent',
 					'requires_extension' => array(
-						'amp-animation',
+						'amp-consent',
+						'amp-story',
 					),
-					'spec_name' => 'amp-animation extension .json script',
+					'spec_name' => 'amp-story-consent extension .json script',
+					'unique' => true,
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
 					'nonce' => array(),
 					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-apester-media',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-apester-media]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
+						'dispatch_key' => 3,
 						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
 						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-app-banner',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
+							'application/json',
 						),
 					),
-					'spec_name' => 'script [custom-element=amp-app-banner]',
 				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
 					),
+					'max_bytes' => 15000,
+					'max_bytes_spec_url' => 'https://amp.dev/documentation/components/amp-experiment#configuration',
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-audio',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-audio]',
+					'mandatory_parent' => 'amp-experiment',
+					'spec_name' => 'amp-experiment story extension .json script',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-experiment',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'id' => array(
+						'dispatch_key' => 2,
 						'mandatory' => true,
 						'value' => array(
-							'',
+							'amp-subscriptions',
 						),
 					),
 					'nonce' => array(),
 					'type' => array(
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-auto-ads',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
+							'application/json',
 						),
 					),
-					'spec_name' => 'script [custom-element=amp-auto-ads]',
 				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'html comments',
+						'regex' => '<!--',
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-autocomplete',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'mandatory_parent' => 'head',
+					'requires_extension' => array(
+						'amp-subscriptions',
 					),
-					'spec_name' => 'script [custom-element=amp-autocomplete]',
+					'spec_name' => 'amp-subscriptions extension .json script',
+					'unique' => true,
 				),
 			),
 			array(
@@ -12136,383 +12010,384 @@ class AMP_Allowed_Tags_Generated {
 					),
 				),
 				'tag_spec' => array(
-					'mandatory_parent' => 'amp-autocomplete',
+					'mandatory_parent' => 'amp-user-location',
 					'requires_extension' => array(
-						'amp-autocomplete',
+						'amp-user-location',
 					),
-					'spec_name' => 'amp-autocomplete JSON',
+					'spec_name' => 'amp-user-location extension .json script',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-user-location',
 				),
 			),
+		),
+		'section' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
+					'poool-access-content' => array(
+						'requires_extension' => array(
+							'amp-access-poool',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'poool-access-preview' => array(
+						'requires_extension' => array(
+							'amp-access-poool',
 						),
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-base-carousel',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'disallowed_ancestor' => array(
+						'amp-accordion',
 					),
-					'spec_name' => 'script [custom-element=amp-base-carousel]',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'data-amp-bind-data-expand' => array(),
+					'expanded' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-beopinion',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
+					'child_tags' => array(
+						'first_child_tag_name_oneof' => array(
+							'h1',
+							'h2',
+							'h3',
+							'h4',
+							'h5',
+							'h6',
+							'header',
 						),
+						'mandatory_num_child_tags' => 2,
 					),
-					'spec_name' => 'script [custom-element=amp-beopinion]',
+					'mandatory_parent' => 'amp-accordion',
+					'spec_name' => 'amp-accordion > section',
 				),
 			),
+		),
+		'select' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'autofocus' => array(),
+					'data-amp-bind-autofocus' => array(),
+					'data-amp-bind-disabled' => array(),
+					'data-amp-bind-multiple' => array(),
+					'data-amp-bind-required' => array(),
+					'data-amp-bind-size' => array(),
+					'disabled' => array(),
+					'multiple' => array(),
+					'name' => array(
+						'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
+					),
+					'no-verify' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
+					'required' => array(),
+					'size' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-bind',
-						'requires_usage' => false,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-bind]',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-form',
 				),
 			),
+		),
+		'slot' => array(
 			array(
 				'attr_spec_list' => array(
-					'nonce' => array(),
-					'type' => array(
-						'dispatch_key' => 3,
-						'mandatory' => true,
-						'value_casei' => array(
-							'application/json',
-						),
-					),
-				),
-				'cdata' => array(
-					'blacklisted_cdata_regex' => array(
-						'error_message' => 'html comments',
-						'regex' => '<!--',
-					),
-					'max_bytes' => 100000,
-					'max_bytes_spec_url' => 'https://amp.dev/documentation/components/amp-bind#state',
-				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-state',
-					'requires_extension' => array(
-						'amp-bind',
+					'name' => array(
+						'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
 					),
-					'spec_name' => 'amp-bind extension .json script',
-					'spec_url' => 'https://amp.dev/documentation/components/amp-bind',
 				),
+				'tag_spec' => array(),
+			),
+		),
+		'small' => array(
+			array(
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
 			),
+		),
+		'solidcolor' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'alignment-baseline' => array(),
+					'baseline-shift' => array(),
+					'clip' => array(),
+					'clip-path' => array(),
+					'clip-rule' => array(),
+					'color' => array(),
+					'color-interpolation' => array(),
+					'color-interpolation-filters' => array(),
+					'color-profile' => array(),
+					'color-rendering' => array(),
+					'cursor' => array(),
+					'direction' => array(),
+					'display' => array(),
+					'dominant-baseline' => array(),
+					'enable-background' => array(),
+					'fill' => array(),
+					'fill-opacity' => array(),
+					'fill-rule' => array(),
+					'filter' => array(),
+					'flood-color' => array(),
+					'flood-opacity' => array(),
+					'focusable' => array(),
+					'font-family' => array(),
+					'font-size' => array(),
+					'font-size-adjust' => array(),
+					'font-stretch' => array(),
+					'font-style' => array(),
+					'font-variant' => array(),
+					'font-weight' => array(),
+					'glyph-orientation-horizontal' => array(),
+					'glyph-orientation-vertical' => array(),
+					'image-rendering' => array(),
+					'kerning' => array(),
+					'letter-spacing' => array(),
+					'lighting-color' => array(),
+					'marker-end' => array(),
+					'marker-mid' => array(),
+					'marker-start' => array(),
+					'mask' => array(),
+					'opacity' => array(),
+					'overflow' => array(),
+					'pointer-events' => array(),
+					'shape-rendering' => array(),
+					'solid-color' => array(),
+					'solid-opacity' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'stroke' => array(),
+					'stroke-dasharray' => array(),
+					'stroke-dashoffset' => array(),
+					'stroke-linecap' => array(),
+					'stroke-linejoin' => array(),
+					'stroke-miterlimit' => array(),
+					'stroke-opacity' => array(),
+					'stroke-width' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
+					'text-anchor' => array(),
+					'text-decoration' => array(),
+					'text-rendering' => array(),
+					'unicode-bidi' => array(),
+					'vector-effect' => array(),
+					'visibility' => array(),
+					'word-spacing' => array(),
+					'writing-mode' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-bodymovin-animation',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-bodymovin-animation]',
+					'mandatory_ancestor' => 'svg',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'source' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'media' => array(),
+					'sizes' => array(),
+					'srcset' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'value_url' => array(
+							'allow_relative' => true,
+							'protocol' => array(
+								'data',
+								'http',
+								'https',
+							),
 						),
 					),
+					'type' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-brid-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-brid-player]',
+					'mandatory_parent' => 'picture',
+					'spec_name' => 'picture > source',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-img',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'data-amp-bind-src' => array(),
+					'data-amp-bind-type' => array(),
+					'media' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'value_url' => array(
+							'allow_relative' => true,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
+					'type' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-brightcove',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-brightcove]',
+					'mandatory_parent' => 'amp-video',
+					'spec_name' => 'amp-video > source',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-video',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'data-amp-bind-src' => array(),
+					'data-amp-bind-type' => array(),
+					'media' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'value_url' => array(
+							'allow_relative' => true,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
+					'type' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-byside-content',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-byside-content]',
+					'mandatory_parent' => 'amp-audio',
+					'spec_name' => 'amp-audio > source',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-audio',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'media' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
 						'mandatory' => true,
-						'value' => array(
-							'',
+						'value_url' => array(
+							'allow_relative' => true,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
-					'nonce' => array(),
 					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+						'mandatory' => true,
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-call-tracking',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-call-tracking]',
+					'mandatory_parent' => 'audio',
+					'spec_name' => 'audio > source',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-audio',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'media' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
 						'mandatory' => true,
-						'value' => array(
-							'',
+						'value_url' => array(
+							'allow_relative' => true,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
-					'nonce' => array(),
 					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+						'mandatory' => true,
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-carousel',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-							'0.2',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-carousel]',
+					'mandatory_parent' => 'video',
+					'spec_name' => 'video > source',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-video',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'data-amp-bind-src' => array(),
+					'data-amp-bind-type' => array(),
+					'media' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'value_url' => array(
+							'allow_relative' => true,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
+					'type' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-connatix-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-connatix-player]',
+					'mandatory_parent' => 'amp-ima-video',
+					'requires_extension' => array(
+						'amp-ima-video',
+					),
+					'spec_name' => 'amp-ima-video > source',
 				),
 			),
+		),
+		'spacer' => array(
 			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-consent',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-consent]',
-				),
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
+			),
+		),
+		'span' => array(
+			array(
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
 			),
+		),
+		'stop' => array(
 			array(
 				'attr_spec_list' => array(
-					'nonce' => array(),
-					'type' => array(
-						'dispatch_key' => 3,
-						'mandatory' => true,
-						'value_casei' => array(
-							'application/json',
-						),
-					),
-				),
-				'cdata' => array(
-					'blacklisted_cdata_regex' => array(
-						'error_message' => 'html comments',
-						'regex' => '<!--',
+					'offset' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
 				),
 				'tag_spec' => array(
-					'mandatory_parent' => 'amp-consent',
-					'requires_extension' => array(
-						'amp-consent',
-					),
-					'spec_name' => 'amp-consent extension .json script',
-					'unique' => true,
+					'mandatory_ancestor' => 'lineargradient',
+					'spec_name' => 'lineargradient > stop',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'offset' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-dailymotion',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-dailymotion]',
+					'mandatory_ancestor' => 'radialgradient',
+					'spec_name' => 'radialgradient > stop',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'strike' => array(
+			array(
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
+			),
+		),
+		'strong' => array(
+			array(
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
+			),
+		),
+		'style' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'amp-custom' => array(
 						'mandatory' => true,
 						'value' => array(
 							'',
@@ -12521,5178 +12396,2972 @@ class AMP_Allowed_Tags_Generated {
 					'nonce' => array(),
 					'type' => array(
 						'value_casei' => array(
-							'text/javascript',
+							'text/css',
 						),
 					),
 				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-date-countdown',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+				'cdata' => array(
+					'blacklisted_cdata_regex' => array(
+						'error_message' => 'CSS !important',
+						'regex' => '!\\s*important',
 					),
-					'spec_name' => 'script [custom-element=amp-date-countdown]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
+					'css_spec' => array(
+						'allowed_at_rules' => array(
+							'font-face',
+							'keyframes',
+							'media',
+							'page',
+							'supports',
 						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+						'declaration' => array(),
+						'font_url_spec' => array(
+							'allow_empty' => true,
+							'protocol' => array(
+								'https',
+								'http',
+								'data',
+							),
+						),
+						'image_url_spec' => array(
+							'allow_empty' => true,
+							'protocol' => array(
+								'https',
+								'http',
+								'data',
+								'absolute',
+							),
 						),
+						'validate_keyframes' => false,
 					),
+					'max_bytes' => 50000,
+					'max_bytes_spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#maximum-size',
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-date-display',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-date-display]',
+					'mandatory_parent' => 'head',
+					'spec_name' => 'style amp-custom',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#stylesheets',
+					'unique' => true,
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'amp-boilerplate' => array(
+						'dispatch_key' => 3,
 						'mandatory' => true,
 						'value' => array(
 							'',
 						),
 					),
 					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
+				),
+				'cdata' => array(
+					'cdata_regex' => '\\s*body\\s*{\\s*-webkit-animation:\\s*-amp-start\\s+8s\\s+steps\\(1,\\s*end\\)\\s+0s\\s+1\\s+normal\\s+both;\\s*-moz-animation:\\s*-amp-start\\s+8s\\s+steps\\s*\\(1\\s*,\\s*end\\s*\\)\\s+0s\\s+1\\s+normal\\s+both;\\s*-ms-animation:\\s*-amp-start\\s+8s\\s+steps\\s*\\(1\\s*,\\s*end\\s*\\)\\s+0s\\s+1\\s+normal\\s+both;\\s*animation:\\s*-amp-start\\s+8s\\s+steps\\(1,\\s*end\\)\\s+0s\\s+1\\s+normal\\s+both;?\\s*}\\s*@-webkit-keyframes\\s+-amp-start\\s*{\\s*from\\s*{\\s*visibility:\\s*hidden;?\\s*}\\s*to\\s*{\\s*visibility:\\s*visible;?\\s*}\\s*}\\s*@-moz-keyframes\\s+-amp-start\\s*{\\s*from\\s*{\\s*visibility:\\s*hidden;?\\s*}\\s*to\\s*{\\s*visibility:\\s*visible;?\\s*}\\s*}\\s*@-ms-keyframes\\s+-amp-start\\s*{\\s*from\\s*{\\s*visibility:\\s*hidden;?\\s*}\\s*to\\s*{\\s*visibility:\\s*visible;?\\s*}\\s*}\\s*@-o-keyframes\\s+-amp-start\\s*{\\s*from\\s*{\\s*visibility:\\s*hidden;?\\s*}\\s*to\\s*{\\s*visibility:\\s*visible;?\\s*}\\s*}\\s*@keyframes\\s+-amp-start\\s*{\\s*from\\s*{\\s*visibility:\\s*hidden;?\\s*}\\s*to\\s*{\\s*visibility:\\s*visible;?\\s*}\\s*}\\s*',
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-date-picker',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-date-picker]',
+					'mandatory' => true,
+					'mandatory_parent' => 'head',
+					'spec_name' => 'head > style[amp-boilerplate]',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amp-boilerplate?format=websites',
+					'unique' => true,
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'amp-boilerplate' => array(
+						'dispatch_key' => 3,
 						'mandatory' => true,
 						'value' => array(
 							'',
 						),
 					),
 					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
+				),
+				'cdata' => array(
+					'cdata_regex' => '\\s*body\\s*{\\s*-webkit-animation:\\s*none;\\s*-moz-animation:\\s*none;\\s*-ms-animation:\\s*none;\\s*animation:\\s*none;?\\s*}\\s*',
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-delight-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-delight-player]',
+					'mandatory' => true,
+					'mandatory_ancestor' => 'head',
+					'mandatory_parent' => 'noscript',
+					'spec_name' => 'noscript > style[amp-boilerplate]',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amp-boilerplate?format=websites',
+					'unique' => true,
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'amp-keyframes' => array(
+						'dispatch_key' => 1,
 						'mandatory' => true,
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+				),
+				'cdata' => array(
+					'css_spec' => array(
+						'allowed_at_rules' => array(
+							'keyframes',
+							'media',
+							'supports',
+						),
+						'declaration' => array(
+							'animation-timing-function',
+							'offset-distance',
+							'opacity',
+							'transform',
+							'visibility',
 						),
+						'font_url_spec' => array(),
+						'image_url_spec' => array(),
+						'validate_keyframes' => true,
 					),
+					'max_bytes' => 500000,
+					'max_bytes_spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#keyframes-stylesheet',
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-dynamic-css-classes',
-						'requires_usage' => false,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-dynamic-css-classes]',
+					'mandatory_parent' => 'body',
+					'spec_name' => 'style[amp-keyframes]',
+					'unique' => true,
 				),
 			),
+		),
+		'sub' => array(
 			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
+			),
+		),
+		'summary' => array(
+			array(
+				'attr_spec_list' => array(),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-embedly-card',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-embedly-card]',
+					'mandatory_parent' => 'details',
 				),
 			),
+		),
+		'sup' => array(
+			array(
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
+			),
+		),
+		'svg' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-experiment',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-							'1.0',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-experiment]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'nonce' => array(),
-					'type' => array(
-						'dispatch_key' => 3,
-						'mandatory' => true,
-						'value_casei' => array(
-							'application/json',
-						),
-					),
-				),
-				'cdata' => array(
-					'blacklisted_cdata_regex' => array(
-						'error_message' => 'html comments',
-						'regex' => '<!--',
-					),
-					'max_bytes' => 15000,
-					'max_bytes_spec_url' => 'https://amp.dev/documentation/components/amp-experiment#configuration',
-				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-experiment',
-					'spec_name' => 'amp-experiment extension .json script',
-					'spec_url' => 'https://amp.dev/documentation/components/amp-experiment',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-facebook-comments',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'alignment-baseline' => array(),
+					'baseline-shift' => array(),
+					'clip' => array(),
+					'clip-path' => array(),
+					'clip-rule' => array(),
+					'color' => array(),
+					'color-interpolation' => array(),
+					'color-interpolation-filters' => array(),
+					'color-profile' => array(),
+					'color-rendering' => array(),
+					'contentscripttype' => array(),
+					'contentstyletype' => array(),
+					'cursor' => array(),
+					'direction' => array(),
+					'display' => array(),
+					'dominant-baseline' => array(),
+					'enable-background' => array(),
+					'externalresourcesrequired' => array(),
+					'fill' => array(),
+					'fill-opacity' => array(),
+					'fill-rule' => array(),
+					'filter' => array(),
+					'flood-color' => array(),
+					'flood-opacity' => array(),
+					'focusable' => array(),
+					'font-family' => array(),
+					'font-size' => array(),
+					'font-size-adjust' => array(),
+					'font-stretch' => array(),
+					'font-style' => array(),
+					'font-variant' => array(),
+					'font-weight' => array(),
+					'glyph-orientation-horizontal' => array(),
+					'glyph-orientation-vertical' => array(),
+					'height' => array(),
+					'image-rendering' => array(),
+					'kerning' => array(),
+					'letter-spacing' => array(),
+					'lighting-color' => array(),
+					'marker-end' => array(),
+					'marker-mid' => array(),
+					'marker-start' => array(),
+					'mask' => array(),
+					'opacity' => array(),
+					'overflow' => array(),
+					'pointer-events' => array(),
+					'preserveaspectratio' => array(),
+					'requiredextensions' => array(),
+					'requiredfeatures' => array(),
+					'shape-rendering' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'stroke' => array(),
+					'stroke-dasharray' => array(),
+					'stroke-dashoffset' => array(),
+					'stroke-linecap' => array(),
+					'stroke-linejoin' => array(),
+					'stroke-miterlimit' => array(),
+					'stroke-opacity' => array(),
+					'stroke-width' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
-					'spec_name' => 'script [custom-element=amp-facebook-comments]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'systemlanguage' => array(),
+					'text-anchor' => array(),
+					'text-decoration' => array(),
+					'text-rendering' => array(),
+					'unicode-bidi' => array(),
+					'vector-effect' => array(),
+					'version' => array(
 						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+							'1.0',
+							'1.1',
 						),
 					),
+					'viewbox' => array(),
+					'visibility' => array(),
+					'width' => array(),
+					'word-spacing' => array(),
+					'writing-mode' => array(),
+					'x' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
+					'y' => array(),
+					'zoomandpan' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-facebook-like',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-facebook-like]',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'switch' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'alignment-baseline' => array(),
+					'baseline-shift' => array(),
+					'clip' => array(),
+					'clip-path' => array(),
+					'clip-rule' => array(),
+					'color' => array(),
+					'color-interpolation' => array(),
+					'color-interpolation-filters' => array(),
+					'color-profile' => array(),
+					'color-rendering' => array(),
+					'cursor' => array(),
+					'direction' => array(),
+					'display' => array(),
+					'dominant-baseline' => array(),
+					'enable-background' => array(),
+					'fill' => array(),
+					'fill-opacity' => array(),
+					'fill-rule' => array(),
+					'filter' => array(),
+					'flood-color' => array(),
+					'flood-opacity' => array(),
+					'focusable' => array(),
+					'font-family' => array(),
+					'font-size' => array(),
+					'font-size-adjust' => array(),
+					'font-stretch' => array(),
+					'font-style' => array(),
+					'font-variant' => array(),
+					'font-weight' => array(),
+					'glyph-orientation-horizontal' => array(),
+					'glyph-orientation-vertical' => array(),
+					'image-rendering' => array(),
+					'kerning' => array(),
+					'letter-spacing' => array(),
+					'lighting-color' => array(),
+					'marker-end' => array(),
+					'marker-mid' => array(),
+					'marker-start' => array(),
+					'mask' => array(),
+					'opacity' => array(),
+					'overflow' => array(),
+					'pointer-events' => array(),
+					'requiredextensions' => array(),
+					'requiredfeatures' => array(),
+					'shape-rendering' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'stroke' => array(),
+					'stroke-dasharray' => array(),
+					'stroke-dashoffset' => array(),
+					'stroke-linecap' => array(),
+					'stroke-linejoin' => array(),
+					'stroke-miterlimit' => array(),
+					'stroke-opacity' => array(),
+					'stroke-width' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
+					'systemlanguage' => array(),
+					'text-anchor' => array(),
+					'text-decoration' => array(),
+					'text-rendering' => array(),
+					'unicode-bidi' => array(),
+					'vector-effect' => array(),
+					'visibility' => array(),
+					'word-spacing' => array(),
+					'writing-mode' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-facebook-page',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-facebook-page]',
+					'mandatory_ancestor' => 'svg',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'symbol' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'alignment-baseline' => array(),
+					'baseline-shift' => array(),
+					'clip' => array(),
+					'clip-path' => array(),
+					'clip-rule' => array(),
+					'color' => array(),
+					'color-interpolation' => array(),
+					'color-interpolation-filters' => array(),
+					'color-profile' => array(),
+					'color-rendering' => array(),
+					'cursor' => array(),
+					'direction' => array(),
+					'display' => array(),
+					'dominant-baseline' => array(),
+					'enable-background' => array(),
+					'externalresourcesrequired' => array(),
+					'fill' => array(),
+					'fill-opacity' => array(),
+					'fill-rule' => array(),
+					'filter' => array(),
+					'flood-color' => array(),
+					'flood-opacity' => array(),
+					'focusable' => array(),
+					'font-family' => array(),
+					'font-size' => array(),
+					'font-size-adjust' => array(),
+					'font-stretch' => array(),
+					'font-style' => array(),
+					'font-variant' => array(),
+					'font-weight' => array(),
+					'glyph-orientation-horizontal' => array(),
+					'glyph-orientation-vertical' => array(),
+					'height' => array(),
+					'image-rendering' => array(),
+					'kerning' => array(),
+					'letter-spacing' => array(),
+					'lighting-color' => array(),
+					'marker-end' => array(),
+					'marker-mid' => array(),
+					'marker-start' => array(),
+					'mask' => array(),
+					'opacity' => array(),
+					'overflow' => array(),
+					'pointer-events' => array(),
+					'preserveaspectratio' => array(),
+					'shape-rendering' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'stroke' => array(),
+					'stroke-dasharray' => array(),
+					'stroke-dashoffset' => array(),
+					'stroke-linecap' => array(),
+					'stroke-linejoin' => array(),
+					'stroke-miterlimit' => array(),
+					'stroke-opacity' => array(),
+					'stroke-width' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
+					'text-anchor' => array(),
+					'text-decoration' => array(),
+					'text-rendering' => array(),
+					'unicode-bidi' => array(),
+					'vector-effect' => array(),
+					'viewbox' => array(),
+					'visibility' => array(),
+					'width' => array(),
+					'word-spacing' => array(),
+					'writing-mode' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-facebook',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-facebook]',
+					'mandatory_ancestor' => 'svg',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'table' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'align' => array(),
+					'bgcolor' => array(),
+					'border' => array(
 						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-fit-text',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
+							'0',
+							'1',
 						),
 					),
-					'spec_name' => 'script [custom-element=amp-fit-text]',
+					'cellpadding' => array(),
+					'cellspacing' => array(),
+					'sortable' => array(),
+					'width' => array(),
 				),
+				'tag_spec' => array(),
 			),
+		),
+		'tbody' => array(
 			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-font',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-font]',
-				),
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
 			),
+		),
+		'td' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-form',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-form]',
+					'align' => array(),
+					'bgcolor' => array(),
+					'colspan' => array(),
+					'headers' => array(),
+					'height' => array(),
+					'rowspan' => array(),
+					'valign' => array(),
+					'width' => array(),
 				),
+				'tag_spec' => array(),
 			),
+		),
+		'template' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'date-template' => array(
+						'dispatch_key' => 1,
 						'mandatory' => true,
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
+					'dates' => array(),
+					'default' => array(),
 					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+						'mandatory' => true,
+						'value' => array(
+							'amp-mustache',
 						),
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-fx-collection',
-						'requires_usage' => false,
-						'version' => array(
-							'0.1',
-						),
+					'mandatory_parent' => 'amp-date-picker',
+					'requires_extension' => array(
+						'amp-mustache',
 					),
-					'spec_name' => 'script [custom-element=amp-fx-collection]',
+					'spec_name' => 'amp-date-picker > template [date-template]',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
+					'info-template' => array(
+						'dispatch_key' => 1,
 						'mandatory' => true,
-						'value' => array(
-							'',
-						),
 					),
-					'nonce' => array(),
 					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+						'mandatory' => true,
+						'value' => array(
+							'amp-mustache',
 						),
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-fx-flying-carpet',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'mandatory_parent' => 'amp-date-picker',
+					'requires_extension' => array(
+						'amp-mustache',
 					),
-					'spec_name' => 'script [custom-element=amp-fx-flying-carpet]',
+					'spec_name' => 'amp-date-picker > template [info-template]',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
+					'id' => array(
+						'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|AMP|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|i-amphtml-\\S*|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
 					),
-					'nonce' => array(),
 					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+						'mandatory' => true,
+						'value' => array(
+							'amp-mustache',
 						),
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-geo',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'disallowed_ancestor' => array(
+						'template',
+						'amp-date-picker',
+						'amp-story-auto-ads',
+						'form div [submit-success][template]',
+						'form div [submit-error][template]',
+						'form div [submitting][template]',
+						'form div [verify-error][template]',
+					),
+					'mandatory_ancestor' => 'body',
+					'requires_extension' => array(
+						'amp-mustache',
 					),
-					'spec_name' => 'script [custom-element=amp-geo]',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'nonce' => array(),
 					'type' => array(
 						'dispatch_key' => 3,
 						'mandatory' => true,
-						'value_casei' => array(
-							'application/json',
+						'value' => array(
+							'amp-mustache',
 						),
 					),
 				),
-				'cdata' => array(
-					'blacklisted_cdata_regex' => array(
-						'error_message' => 'html comments',
-						'regex' => '<!--',
-					),
-				),
 				'tag_spec' => array(
-					'mandatory_parent' => 'amp-geo',
+					'descendant_tag_list' => 'amp-story-grid-layer-allowed-descendants',
+					'mandatory_parent' => 'amp-story-auto-ads',
+					'reference_points' => array(
+						'AMP-STORY-GRID-LAYER animate-in' => array(
+							'mandatory' => false,
+							'unique' => false,
+						),
+						'AMP-STORY-GRID-LAYER default' => array(
+							'mandatory' => false,
+							'unique' => false,
+						),
+					),
 					'requires_extension' => array(
-						'amp-geo',
+						'amp-mustache',
 					),
-					'spec_name' => 'amp-geo extension .json script',
-					'spec_url' => 'https://amp.dev/documentation/components/amp-geo',
+					'spec_name' => 'amp-story-auto-ads > template',
 				),
 			),
+		),
+		'text' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'alignment-baseline' => array(),
+					'baseline-shift' => array(),
+					'clip' => array(),
+					'clip-path' => array(),
+					'clip-rule' => array(),
+					'color' => array(),
+					'color-interpolation' => array(),
+					'color-interpolation-filters' => array(),
+					'color-profile' => array(),
+					'color-rendering' => array(),
+					'cursor' => array(),
+					'direction' => array(),
+					'display' => array(),
+					'dominant-baseline' => array(),
+					'dx' => array(),
+					'dy' => array(),
+					'enable-background' => array(),
+					'externalresourcesrequired' => array(),
+					'fill' => array(),
+					'fill-opacity' => array(),
+					'fill-rule' => array(),
+					'filter' => array(),
+					'flood-color' => array(),
+					'flood-opacity' => array(),
+					'focusable' => array(),
+					'font-family' => array(),
+					'font-size' => array(),
+					'font-size-adjust' => array(),
+					'font-stretch' => array(),
+					'font-style' => array(),
+					'font-variant' => array(),
+					'font-weight' => array(),
+					'glyph-orientation-horizontal' => array(),
+					'glyph-orientation-vertical' => array(),
+					'image-rendering' => array(),
+					'kerning' => array(),
+					'lengthadjust' => array(),
+					'letter-spacing' => array(),
+					'lighting-color' => array(),
+					'marker-end' => array(),
+					'marker-mid' => array(),
+					'marker-start' => array(),
+					'mask' => array(),
+					'opacity' => array(),
+					'overflow' => array(),
+					'pointer-events' => array(),
+					'requiredextensions' => array(),
+					'requiredfeatures' => array(),
+					'rotate' => array(),
+					'shape-rendering' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'stroke' => array(),
+					'stroke-dasharray' => array(),
+					'stroke-dashoffset' => array(),
+					'stroke-linecap' => array(),
+					'stroke-linejoin' => array(),
+					'stroke-miterlimit' => array(),
+					'stroke-opacity' => array(),
+					'stroke-width' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
+					'systemlanguage' => array(),
+					'text-anchor' => array(),
+					'text-decoration' => array(),
+					'text-rendering' => array(),
+					'textlength' => array(),
+					'transform' => array(),
+					'unicode-bidi' => array(),
+					'vector-effect' => array(),
+					'visibility' => array(),
+					'word-spacing' => array(),
+					'writing-mode' => array(),
+					'x' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
+					'y' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-gfycat',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-gfycat]',
+					'mandatory_ancestor' => 'svg',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'textarea' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
+					'autocomplete' => array(),
+					'autoexpand' => array(
+						'requires_extension' => array(
+							'amp-form',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'autofocus' => array(),
+					'cols' => array(),
+					'data-amp-bind-autocomplete' => array(),
+					'data-amp-bind-autofocus' => array(),
+					'data-amp-bind-cols' => array(),
+					'data-amp-bind-defaulttext' => array(),
+					'data-amp-bind-disabled' => array(),
+					'data-amp-bind-maxlength' => array(),
+					'data-amp-bind-minlength' => array(),
+					'data-amp-bind-pattern' => array(),
+					'data-amp-bind-placeholder' => array(),
+					'data-amp-bind-readonly' => array(),
+					'data-amp-bind-required' => array(),
+					'data-amp-bind-rows' => array(),
+					'data-amp-bind-selectiondirection' => array(),
+					'data-amp-bind-selectionend' => array(),
+					'data-amp-bind-selectionstart' => array(),
+					'data-amp-bind-spellcheck' => array(),
+					'data-amp-bind-wrap' => array(),
+					'disabled' => array(),
+					'maxlength' => array(),
+					'minlength' => array(),
+					'name' => array(
+						'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
+					),
+					'no-verify' => array(
+						'value' => array(
+							'',
 						),
 					),
+					'pattern' => array(),
+					'placeholder' => array(),
+					'readonly' => array(),
+					'required' => array(),
+					'rows' => array(),
+					'selectiondirection' => array(),
+					'selectionend' => array(),
+					'selectionstart' => array(),
+					'spellcheck' => array(),
+					'wrap' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-gist',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-gist]',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-form',
 				),
 			),
+		),
+		'textpath' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
+					'alignment-baseline' => array(),
+					'baseline-shift' => array(),
+					'clip' => array(),
+					'clip-path' => array(),
+					'clip-rule' => array(),
+					'color' => array(),
+					'color-interpolation' => array(),
+					'color-interpolation-filters' => array(),
+					'color-profile' => array(),
+					'color-rendering' => array(),
+					'cursor' => array(),
+					'direction' => array(),
+					'display' => array(),
+					'dominant-baseline' => array(),
+					'enable-background' => array(),
+					'externalresourcesrequired' => array(),
+					'fill' => array(),
+					'fill-opacity' => array(),
+					'fill-rule' => array(),
+					'filter' => array(),
+					'flood-color' => array(),
+					'flood-opacity' => array(),
+					'focusable' => array(),
+					'font-family' => array(),
+					'font-size' => array(),
+					'font-size-adjust' => array(),
+					'font-stretch' => array(),
+					'font-style' => array(),
+					'font-variant' => array(),
+					'font-weight' => array(),
+					'glyph-orientation-horizontal' => array(),
+					'glyph-orientation-vertical' => array(),
+					'image-rendering' => array(),
+					'kerning' => array(),
+					'letter-spacing' => array(),
+					'lighting-color' => array(),
+					'marker-end' => array(),
+					'marker-mid' => array(),
+					'marker-start' => array(),
+					'mask' => array(),
+					'method' => array(),
+					'opacity' => array(),
+					'overflow' => array(),
+					'pointer-events' => array(),
+					'requiredextensions' => array(),
+					'requiredfeatures' => array(),
+					'shape-rendering' => array(),
+					'spacing' => array(),
+					'startoffset' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'stroke' => array(),
+					'stroke-dasharray' => array(),
+					'stroke-dashoffset' => array(),
+					'stroke-linecap' => array(),
+					'stroke-linejoin' => array(),
+					'stroke-miterlimit' => array(),
+					'stroke-opacity' => array(),
+					'stroke-width' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'systemlanguage' => array(),
+					'text-anchor' => array(),
+					'text-decoration' => array(),
+					'text-rendering' => array(),
+					'unicode-bidi' => array(),
+					'vector-effect' => array(),
+					'visibility' => array(),
+					'word-spacing' => array(),
+					'writing-mode' => array(),
+					'xlink:actuate' => array(),
+					'xlink:arcrole' => array(),
+					'xlink:href' => array(
+						'alternative_names' => array(
+							'href',
+						),
+						'value_url' => array(
+							'allow_empty' => false,
+							'protocol' => array(
+								'http',
+								'https',
+							),
 						),
 					),
+					'xlink:role' => array(),
+					'xlink:show' => array(),
+					'xlink:title' => array(),
+					'xlink:type' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-google-document-embed',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-google-document-embed]',
+					'mandatory_ancestor' => 'svg',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'tfoot' => array(
+			array(
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
+			),
+		),
+		'th' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
+					'abbr' => array(),
+					'align' => array(),
+					'bgcolor' => array(),
+					'colspan' => array(),
+					'headers' => array(),
+					'height' => array(),
+					'rowspan' => array(),
+					'scope' => array(),
+					'sorted' => array(),
+					'valign' => array(),
+					'width' => array(),
 				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-hulu',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-hulu]',
+				'tag_spec' => array(),
+			),
+		),
+		'thead' => array(
+			array(
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
+			),
+		),
+		'time' => array(
+			array(
+				'attr_spec_list' => array(
+					'datetime' => array(),
 				),
+				'tag_spec' => array(),
 			),
+		),
+		'title' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
+					'data-amp-bind-text' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-iframe',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-iframe]',
+					'spec_name' => 'title',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-ima-video',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-ima-video]',
+					'mandatory_ancestor' => 'svg',
+					'spec_name' => 'svg title',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'tr' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-image-lightbox',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-image-lightbox]',
+					'align' => array(),
+					'bgcolor' => array(),
+					'height' => array(),
+					'valign' => array(),
 				),
+				'tag_spec' => array(),
 			),
+		),
+		'track' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'default' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'kind' => array(
+						'value' => array(
+							'captions',
+							'chapters',
+							'descriptions',
+							'metadata',
 						),
 					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-image-slider',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
+					'label' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'mandatory' => true,
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
-					'spec_name' => 'script [custom-element=amp-image-slider]',
+					'srclang' => array(),
+				),
+				'tag_spec' => array(
+					'mandatory_parent' => 'audio',
+					'spec_name' => 'audio > track',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'default' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
+					'kind' => array(
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'subtitles',
 						),
 					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-imgur',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
+					'label' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'mandatory' => true,
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
-					'spec_name' => 'script [custom-element=amp-imgur]',
+					'srclang' => array(
+						'mandatory' => true,
+					),
+				),
+				'tag_spec' => array(
+					'mandatory_parent' => 'audio',
+					'spec_name' => 'audio > track[kind=subtitles]',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'default' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'kind' => array(
+						'value' => array(
+							'captions',
+							'chapters',
+							'descriptions',
+							'metadata',
 						),
 					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-inputmask',
-						'requires_usage' => false,
-						'version' => array(
-							'0.1',
+					'label' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'mandatory' => true,
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
-					'spec_name' => 'script [custom-element=amp-inputmask]',
+					'srclang' => array(),
+				),
+				'tag_spec' => array(
+					'mandatory_parent' => 'video',
+					'spec_name' => 'video > track',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'default' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
+					'kind' => array(
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'subtitles',
 						),
 					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-instagram',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
+					'label' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'mandatory' => true,
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
-					'spec_name' => 'script [custom-element=amp-instagram]',
+					'srclang' => array(
+						'mandatory' => true,
+					),
+				),
+				'tag_spec' => array(
+					'mandatory_parent' => 'video',
+					'spec_name' => 'video > track[kind=subtitles]',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'data-amp-bind-label' => array(),
+					'data-amp-bind-src' => array(),
+					'data-amp-bind-srclang' => array(),
+					'default' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'kind' => array(
+						'value' => array(
+							'captions',
+							'chapters',
+							'descriptions',
+							'metadata',
 						),
 					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-install-serviceworker',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
+					'label' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'mandatory' => true,
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
-					'spec_name' => 'script [custom-element=amp-install-serviceworker]',
+					'srclang' => array(),
+				),
+				'tag_spec' => array(
+					'mandatory_parent' => 'amp-audio',
+					'spec_name' => 'amp-audio > track',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'data-amp-bind-label' => array(),
+					'data-amp-bind-src' => array(),
+					'data-amp-bind-srclang' => array(),
+					'default' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
+					'kind' => array(
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
+							'subtitles',
 						),
 					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-izlesene',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-izlesene]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
+					'label' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
 						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-jwplayer',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
-					'spec_name' => 'script [custom-element=amp-jwplayer]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
+					'srclang' => array(
 						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-kaltura-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-kaltura-player]',
+					'mandatory_parent' => 'amp-audio',
+					'spec_name' => 'amp-audio > track[kind=subtitles]',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'data-amp-bind-label' => array(),
+					'data-amp-bind-src' => array(),
+					'data-amp-bind-srclang' => array(),
+					'default' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-lightbox-gallery',
-						'requires_usage' => false,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-lightbox-gallery]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'kind' => array(
 						'value' => array(
-							'',
+							'captions',
+							'chapters',
+							'descriptions',
+							'metadata',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'label' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'mandatory' => true,
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
+					'srclang' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-lightbox',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-lightbox]',
+					'mandatory_parent' => 'amp-video',
+					'spec_name' => 'amp-video > track',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'data-amp-bind-label' => array(),
+					'data-amp-bind-src' => array(),
+					'data-amp-bind-srclang' => array(),
+					'default' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-link-rewriter',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-link-rewriter]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'nonce' => array(),
-					'type' => array(
-						'dispatch_key' => 3,
+					'kind' => array(
 						'mandatory' => true,
 						'value_casei' => array(
-							'application/json',
+							'subtitles',
 						),
 					),
-				),
-				'cdata' => array(
-					'blacklisted_cdata_regex' => array(
-						'error_message' => 'html comments',
-						'regex' => '<!--',
-					),
-				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-link-rewriter',
-					'requires_extension' => array(
-						'amp-link-rewriter',
-					),
-					'spec_name' => 'amp-link-rewriter extension .json script',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
+					'label' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
 						'mandatory' => true,
-						'value' => array(
-							'',
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'srclang' => array(
+						'mandatory' => true,
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-list',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-list]',
+					'mandatory_parent' => 'amp-video',
+					'spec_name' => 'amp-video > track[kind=subtitles]',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'data-amp-bind-label' => array(),
+					'data-amp-bind-src' => array(),
+					'data-amp-bind-srclang' => array(),
+					'default' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-live-list',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'mandatory_parent' => 'head',
-					'spec_name' => 'script [custom-element=amp-live-list]',
-					'unique_warning' => true,
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'kind' => array(
 						'value' => array(
-							'',
+							'captions',
+							'chapters',
+							'descriptions',
+							'metadata',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'label' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'mandatory' => true,
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
+					'srclang' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-mathml',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-mathml]',
+					'mandatory_parent' => 'amp-ima-video',
+					'spec_name' => 'amp-ima-video > track',
 				),
 			),
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
+					'data-amp-bind-label' => array(),
+					'data-amp-bind-src' => array(),
+					'data-amp-bind-srclang' => array(),
+					'default' => array(
 						'value' => array(
 							'',
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
+					'kind' => array(
+						'mandatory' => true,
 						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-megaphone',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
+							'subtitles',
 						),
 					),
-					'spec_name' => 'script [custom-element=amp-megaphone]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
+					'label' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
 						'mandatory' => true,
-						'value' => array(
-							'',
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'https',
+							),
 						),
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'srclang' => array(
+						'mandatory' => true,
 					),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-minute-media-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-minute-media-player]',
+					'mandatory_parent' => 'amp-ima-video',
+					'spec_name' => 'amp-ima-video > track[kind=subtitles]',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-ima-video',
 				),
 			),
+		),
+		'tref' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
+					'alignment-baseline' => array(),
+					'baseline-shift' => array(),
+					'clip' => array(),
+					'clip-path' => array(),
+					'clip-rule' => array(),
+					'color' => array(),
+					'color-interpolation' => array(),
+					'color-interpolation-filters' => array(),
+					'color-profile' => array(),
+					'color-rendering' => array(),
+					'cursor' => array(),
+					'direction' => array(),
+					'display' => array(),
+					'dominant-baseline' => array(),
+					'enable-background' => array(),
+					'externalresourcesrequired' => array(),
+					'fill' => array(),
+					'fill-opacity' => array(),
+					'fill-rule' => array(),
+					'filter' => array(),
+					'flood-color' => array(),
+					'flood-opacity' => array(),
+					'focusable' => array(),
+					'font-family' => array(),
+					'font-size' => array(),
+					'font-size-adjust' => array(),
+					'font-stretch' => array(),
+					'font-style' => array(),
+					'font-variant' => array(),
+					'font-weight' => array(),
+					'glyph-orientation-horizontal' => array(),
+					'glyph-orientation-vertical' => array(),
+					'image-rendering' => array(),
+					'kerning' => array(),
+					'letter-spacing' => array(),
+					'lighting-color' => array(),
+					'marker-end' => array(),
+					'marker-mid' => array(),
+					'marker-start' => array(),
+					'mask' => array(),
+					'opacity' => array(),
+					'overflow' => array(),
+					'pointer-events' => array(),
+					'requiredextensions' => array(),
+					'requiredfeatures' => array(),
+					'shape-rendering' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'stroke' => array(),
+					'stroke-dasharray' => array(),
+					'stroke-dashoffset' => array(),
+					'stroke-linecap' => array(),
+					'stroke-linejoin' => array(),
+					'stroke-miterlimit' => array(),
+					'stroke-opacity' => array(),
+					'stroke-width' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'systemlanguage' => array(),
+					'text-anchor' => array(),
+					'text-decoration' => array(),
+					'text-rendering' => array(),
+					'unicode-bidi' => array(),
+					'vector-effect' => array(),
+					'visibility' => array(),
+					'word-spacing' => array(),
+					'writing-mode' => array(),
+					'xlink:actuate' => array(),
+					'xlink:arcrole' => array(),
+					'xlink:href' => array(
+						'alternative_names' => array(
+							'href',
+						),
+						'value_url' => array(
+							'allow_empty' => false,
+							'protocol' => array(
+								'http',
+								'https',
+							),
 						),
 					),
+					'xlink:role' => array(),
+					'xlink:show' => array(),
+					'xlink:title' => array(),
+					'xlink:type' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-mowplayer',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-mowplayer]',
+					'mandatory_ancestor' => 'svg',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'tspan' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'alignment-baseline' => array(),
+					'baseline-shift' => array(),
+					'clip' => array(),
+					'clip-path' => array(),
+					'clip-rule' => array(),
+					'color' => array(),
+					'color-interpolation' => array(),
+					'color-interpolation-filters' => array(),
+					'color-profile' => array(),
+					'color-rendering' => array(),
+					'cursor' => array(),
+					'direction' => array(),
+					'display' => array(),
+					'dominant-baseline' => array(),
+					'dx' => array(),
+					'dy' => array(),
+					'enable-background' => array(),
+					'externalresourcesrequired' => array(),
+					'fill' => array(),
+					'fill-opacity' => array(),
+					'fill-rule' => array(),
+					'filter' => array(),
+					'flood-color' => array(),
+					'flood-opacity' => array(),
+					'focusable' => array(),
+					'font-family' => array(),
+					'font-size' => array(),
+					'font-size-adjust' => array(),
+					'font-stretch' => array(),
+					'font-style' => array(),
+					'font-variant' => array(),
+					'font-weight' => array(),
+					'glyph-orientation-horizontal' => array(),
+					'glyph-orientation-vertical' => array(),
+					'image-rendering' => array(),
+					'kerning' => array(),
+					'lengthadjust' => array(),
+					'letter-spacing' => array(),
+					'lighting-color' => array(),
+					'marker-end' => array(),
+					'marker-mid' => array(),
+					'marker-start' => array(),
+					'mask' => array(),
+					'opacity' => array(),
+					'overflow' => array(),
+					'pointer-events' => array(),
+					'requiredextensions' => array(),
+					'requiredfeatures' => array(),
+					'rotate' => array(),
+					'shape-rendering' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'stroke' => array(),
+					'stroke-dasharray' => array(),
+					'stroke-dashoffset' => array(),
+					'stroke-linecap' => array(),
+					'stroke-linejoin' => array(),
+					'stroke-miterlimit' => array(),
+					'stroke-opacity' => array(),
+					'stroke-width' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
+					'systemlanguage' => array(),
+					'text-anchor' => array(),
+					'text-decoration' => array(),
+					'text-rendering' => array(),
+					'textlength' => array(),
+					'unicode-bidi' => array(),
+					'vector-effect' => array(),
+					'visibility' => array(),
+					'word-spacing' => array(),
+					'writing-mode' => array(),
+					'x' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
+					'y' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'extension_type' => 2,
-						'name' => 'amp-mustache',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-							'0.2',
-						),
-					),
-					'spec_name' => 'script [custom-template=amp-mustache]',
+					'mandatory_ancestor' => 'svg',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'tt' => array(
 			array(
-				'attr_spec_list' => array(
-					'nonce' => array(),
-					'template' => array(
-						'dispatch_key' => 2,
-						'mandatory' => true,
-						'value' => array(
-							'amp-mustache',
-						),
-					),
-					'type' => array(
-						'mandatory' => true,
-						'value_casei' => array(
-							'text/plain',
-						),
-					),
-				),
-				'cdata' => array(
-					'blacklisted_cdata_regex' => array(
-						'error_message' => 'html comments',
-						'regex' => '<!--',
-					),
-				),
-				'tag_spec' => array(
-					'disallowed_ancestor' => array(
-						'template',
-						'amp-date-picker',
-						'form div [submit-success][template]',
-						'form div [submit-error][template]',
-						'form div [submitting][template]',
-						'form div [verify-error][template]',
-					),
-					'requires_extension' => array(
-						'amp-mustache',
-					),
-					'spec_name' => 'SCRIPT type=text/plain',
-				),
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
 			),
+		),
+		'u' => array(
 			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-next-page',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-next-page]',
-				),
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
 			),
+		),
+		'ul' => array(
 			array(
-				'attr_spec_list' => array(
-					'type' => array(
-						'dispatch_key' => 3,
-						'mandatory' => true,
-						'value_casei' => array(
-							'application/json',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-next-page',
-					'requires_extension' => array(
-						'amp-next-page',
-					),
-					'spec_name' => 'amp-next-page extension .json configuration',
-					'spec_url' => 'https://amp.dev/documentation/components/amp-next-page',
-				),
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
 			),
+		),
+		'use' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-nexxtv-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
+					'alignment-baseline' => array(),
+					'baseline-shift' => array(),
+					'clip' => array(),
+					'clip-path' => array(),
+					'clip-rule' => array(),
+					'color' => array(),
+					'color-interpolation' => array(),
+					'color-interpolation-filters' => array(),
+					'color-profile' => array(),
+					'color-rendering' => array(),
+					'cursor' => array(),
+					'direction' => array(),
+					'display' => array(),
+					'dominant-baseline' => array(),
+					'enable-background' => array(),
+					'externalresourcesrequired' => array(),
+					'fill' => array(),
+					'fill-opacity' => array(),
+					'fill-rule' => array(),
+					'filter' => array(),
+					'flood-color' => array(),
+					'flood-opacity' => array(),
+					'focusable' => array(),
+					'font-family' => array(),
+					'font-size' => array(),
+					'font-size-adjust' => array(),
+					'font-stretch' => array(),
+					'font-style' => array(),
+					'font-variant' => array(),
+					'font-weight' => array(),
+					'glyph-orientation-horizontal' => array(),
+					'glyph-orientation-vertical' => array(),
+					'height' => array(),
+					'image-rendering' => array(),
+					'kerning' => array(),
+					'letter-spacing' => array(),
+					'lighting-color' => array(),
+					'marker-end' => array(),
+					'marker-mid' => array(),
+					'marker-start' => array(),
+					'mask' => array(),
+					'opacity' => array(),
+					'overflow' => array(),
+					'pointer-events' => array(),
+					'requiredextensions' => array(),
+					'requiredfeatures' => array(),
+					'shape-rendering' => array(),
+					'stop-color' => array(),
+					'stop-opacity' => array(),
+					'stroke' => array(),
+					'stroke-dasharray' => array(),
+					'stroke-dashoffset' => array(),
+					'stroke-linecap' => array(),
+					'stroke-linejoin' => array(),
+					'stroke-miterlimit' => array(),
+					'stroke-opacity' => array(),
+					'stroke-width' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
-					'spec_name' => 'script [custom-element=amp-nexxtv-player]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
+					'systemlanguage' => array(),
+					'text-anchor' => array(),
+					'text-decoration' => array(),
+					'text-rendering' => array(),
+					'transform' => array(),
+					'unicode-bidi' => array(),
+					'vector-effect' => array(),
+					'visibility' => array(),
+					'width' => array(),
+					'word-spacing' => array(),
+					'writing-mode' => array(),
+					'x' => array(),
+					'xlink:actuate' => array(),
+					'xlink:arcrole' => array(),
+					'xlink:href' => array(
+						'alternative_names' => array(
+							'href',
 						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+						'value_url' => array(
+							'allow_empty' => false,
+							'protocol' => array(
+								'http',
+								'https',
+							),
 						),
 					),
+					'xlink:role' => array(),
+					'xlink:show' => array(),
+					'xlink:title' => array(),
+					'xlink:type' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
+					'y' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-o2-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-o2-player]',
+					'mandatory_ancestor' => 'svg',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'var' => array(
 			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-ooyala-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-ooyala-player]',
-				),
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
 			),
+		),
+		'video' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
+					'autoplay' => array(),
+					'controls' => array(),
+					'height' => array(),
+					'loop' => array(),
+					'muted' => array(),
+					'playsinline' => array(),
+					'poster' => array(),
+					'preload' => array(),
+					'src' => array(
+						'blacklisted_value_regex' => '__amp_source_origin',
+						'value_url' => array(
+							'allow_relative' => false,
+							'protocol' => array(
+								'data',
+								'https',
+							),
 						),
 					),
+					'width' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-orientation-observer',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-orientation-observer]',
+					'mandatory_ancestor' => 'noscript',
+					'mandatory_ancestor_suggested_alternative' => 'amp-video',
+					'spec_url' => 'https://amp.dev/documentation/components/amp-video',
 				),
 			),
+		),
+		'view' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'externalresourcesrequired' => array(),
+					'preserveaspectratio' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
+					'viewbox' => array(),
+					'viewtarget' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
+					'zoomandpan' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-pan-zoom',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-pan-zoom]',
+					'mandatory_ancestor' => 'svg',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'vkern' => array(
 			array(
 				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
+					'g1' => array(),
+					'g2' => array(),
+					'k' => array(),
+					'style' => array(
+						'blacklisted_value_regex' => '!\\s*important',
 					),
+					'u1' => array(),
+					'u2' => array(),
+					'xml:lang' => array(),
+					'xml:space' => array(),
+					'xmlns' => array(),
+					'xmlns:xlink' => array(),
 				),
 				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-pinterest',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-pinterest]',
+					'mandatory_ancestor' => 'svg',
+					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
 				),
 			),
+		),
+		'wbr' => array(
 			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-playbuzz',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-playbuzz]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-position-observer',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-position-observer]',
-				),
+				'attr_spec_list' => array(),
+				'tag_spec' => array(),
 			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-powr-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-powr-player]',
-				),
+		),
+	);
+
+	private static $layout_allowed_attrs = array(
+		'data-amp-bind-height' => array(),
+		'data-amp-bind-width' => array(),
+		'height' => array(),
+		'heights' => array(),
+		'layout' => array(),
+		'sizes' => array(),
+		'width' => array(),
+	);
+
+
+	private static $globally_allowed_attrs = array(
+		'about' => array(),
+		'accesskey' => array(),
+		'amp-access' => array(),
+		'amp-access-behavior' => array(),
+		'amp-access-hide' => array(),
+		'amp-access-id' => array(),
+		'amp-access-loader' => array(),
+		'amp-access-loading' => array(),
+		'amp-access-off' => array(),
+		'amp-access-on' => array(),
+		'amp-access-show' => array(),
+		'amp-access-style' => array(),
+		'amp-access-template' => array(),
+		'amp-fx' => array(
+			'requires_extension' => array(
+				'amp-fx-collection',
 			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-reach-player',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-reach-player]',
-				),
+			'value_regex_casei' => '(fade-in|fade-in-scroll|float-in-bottom|float-in-top|fly-in-bottom|fly-in-left|fly-in-right|fly-in-top|parallax)(\\s|fade-in|fade-in-scroll|float-in-bottom|float-in-top|fly-in-bottom|fly-in-left|fly-in-right|fly-in-top|parallax)*',
+		),
+		'aria-activedescendant' => array(),
+		'aria-atomic' => array(),
+		'aria-autocomplete' => array(),
+		'aria-busy' => array(),
+		'aria-checked' => array(),
+		'aria-controls' => array(),
+		'aria-current' => array(),
+		'aria-describedby' => array(),
+		'aria-disabled' => array(),
+		'aria-dropeffect' => array(),
+		'aria-expanded' => array(),
+		'aria-flowto' => array(),
+		'aria-grabbed' => array(),
+		'aria-haspopup' => array(),
+		'aria-hidden' => array(),
+		'aria-invalid' => array(),
+		'aria-label' => array(),
+		'aria-labelledby' => array(),
+		'aria-level' => array(),
+		'aria-live' => array(),
+		'aria-multiline' => array(),
+		'aria-multiselectable' => array(),
+		'aria-orientation' => array(),
+		'aria-owns' => array(),
+		'aria-posinset' => array(),
+		'aria-pressed' => array(),
+		'aria-readonly' => array(),
+		'aria-relevant' => array(),
+		'aria-required' => array(),
+		'aria-selected' => array(),
+		'aria-setsize' => array(),
+		'aria-sort' => array(),
+		'aria-valuemax' => array(),
+		'aria-valuemin' => array(),
+		'aria-valuenow' => array(),
+		'aria-valuetext' => array(),
+		'autoscroll' => array(),
+		'class' => array(
+			'blacklisted_value_regex' => '(^|\\W)i-amphtml-',
+		),
+		'content' => array(),
+		'data-amp-bind-aria-activedescendant' => array(),
+		'data-amp-bind-aria-atomic' => array(),
+		'data-amp-bind-aria-autocomplete' => array(),
+		'data-amp-bind-aria-busy' => array(),
+		'data-amp-bind-aria-checked' => array(),
+		'data-amp-bind-aria-controls' => array(),
+		'data-amp-bind-aria-describedby' => array(),
+		'data-amp-bind-aria-disabled' => array(),
+		'data-amp-bind-aria-dropeffect' => array(),
+		'data-amp-bind-aria-expanded' => array(),
+		'data-amp-bind-aria-flowto' => array(),
+		'data-amp-bind-aria-grabbed' => array(),
+		'data-amp-bind-aria-haspopup' => array(),
+		'data-amp-bind-aria-hidden' => array(),
+		'data-amp-bind-aria-invalid' => array(),
+		'data-amp-bind-aria-label' => array(),
+		'data-amp-bind-aria-labelledby' => array(),
+		'data-amp-bind-aria-level' => array(),
+		'data-amp-bind-aria-live' => array(),
+		'data-amp-bind-aria-multiline' => array(),
+		'data-amp-bind-aria-multiselectable' => array(),
+		'data-amp-bind-aria-orientation' => array(),
+		'data-amp-bind-aria-owns' => array(),
+		'data-amp-bind-aria-posinset' => array(),
+		'data-amp-bind-aria-pressed' => array(),
+		'data-amp-bind-aria-readonly' => array(),
+		'data-amp-bind-aria-relevant' => array(),
+		'data-amp-bind-aria-required' => array(),
+		'data-amp-bind-aria-selected' => array(),
+		'data-amp-bind-aria-setsize' => array(),
+		'data-amp-bind-aria-sort' => array(),
+		'data-amp-bind-aria-valuemax' => array(),
+		'data-amp-bind-aria-valuemin' => array(),
+		'data-amp-bind-aria-valuenow' => array(),
+		'data-amp-bind-aria-valuetext' => array(),
+		'data-amp-bind-class' => array(),
+		'data-amp-bind-hidden' => array(),
+		'data-amp-bind-text' => array(),
+		'datatype' => array(),
+		'dir' => array(),
+		'draggable' => array(),
+		'fallback' => array(
+			'value' => array(
+				'',
 			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-recaptcha-input',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-recaptcha-input]',
-				),
+		),
+		'hidden' => array(
+			'value' => array(
+				'',
 			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-reddit',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-reddit]',
-				),
+		),
+		'i-amp-access-id' => array(),
+		'id' => array(
+			'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|AMP|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|i-amphtml-\\S*|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
+		),
+		'inlist' => array(),
+		'itemid' => array(),
+		'itemprop' => array(),
+		'itemref' => array(),
+		'itemscope' => array(),
+		'itemtype' => array(),
+		'lang' => array(),
+		'on' => array(),
+		'overflow' => array(),
+		'placeholder' => array(
+			'value' => array(
+				'',
 			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-riddle-quiz',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-riddle-quiz]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-script',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-script]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'id' => array(
-						'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|AMP|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|i-amphtml-\\S*|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
-						'mandatory' => true,
-					),
-					'nonce' => array(),
-					'target' => array(
-						'dispatch_key' => 2,
-						'mandatory' => true,
-						'value' => array(
-							'amp-script',
-						),
-					),
-					'type' => array(
-						'mandatory' => true,
-						'value_casei' => array(
-							'text/plain',
-						),
-					),
-				),
-				'cdata' => array(
-					'blacklisted_cdata_regex' => array(
-						'error_message' => 'html comments',
-						'regex' => '<!--',
-					),
-					'max_bytes' => 10000,
-					'max_bytes_spec_url' => 'https://amp.dev/documentation/components/amp-script#faq',
-				),
-				'tag_spec' => array(
-					'requires_extension' => array(
-						'amp-script',
-					),
-					'spec_name' => 'amp-script extension local script',
-					'spec_url' => 'https://amp.dev/documentation/components/amp-script',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-selector',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-selector]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'extension_spec' => array(
-						'name' => 'amp-sidebar',
-						'requires_usage' => true,
-						'version' => array(
-							'0.1',
-						),
-					),
-					'spec_name' => 'script [custom-element=amp-sidebar]',
-				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'async' => array(
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'nonce' => array(),
-					'type' => array(
-						'value_casei' => array(
-							'text/javascript',
-						),
-					),
-				),
-				'tag_spec' => array(
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-			),
-		),
-		'svg' => array(
-			array(
-				'attr_spec_list' => array(
-					'alignment-baseline' => array(),
-					'baseline-shift' => array(),
-					'clip' => array(),
-					'clip-path' => array(),
-					'clip-rule' => array(),
-					'color' => array(),
-					'color-interpolation' => array(),
-					'color-interpolation-filters' => array(),
-					'color-profile' => array(),
-					'color-rendering' => array(),
-					'contentscripttype' => array(),
-					'contentstyletype' => array(),
-					'cursor' => array(),
-					'direction' => array(),
-					'display' => array(),
-					'dominant-baseline' => array(),
-					'enable-background' => array(),
-					'externalresourcesrequired' => array(),
-					'fill' => array(),
-					'fill-opacity' => array(),
-					'fill-rule' => array(),
-					'filter' => array(),
-					'flood-color' => array(),
-					'flood-opacity' => array(),
-					'focusable' => array(),
-					'font-family' => array(),
-					'font-size' => array(),
-					'font-size-adjust' => array(),
-					'font-stretch' => array(),
-					'font-style' => array(),
-					'font-variant' => array(),
-					'font-weight' => array(),
-					'glyph-orientation-horizontal' => array(),
-					'glyph-orientation-vertical' => array(),
-					'height' => array(),
-					'image-rendering' => array(),
-					'kerning' => array(),
-					'letter-spacing' => array(),
-					'lighting-color' => array(),
-					'marker-end' => array(),
-					'marker-mid' => array(),
-					'marker-start' => array(),
-					'mask' => array(),
-					'opacity' => array(),
-					'overflow' => array(),
-					'pointer-events' => array(),
-					'preserveaspectratio' => array(),
-					'requiredextensions' => array(),
-					'requiredfeatures' => array(),
-					'shape-rendering' => array(),
-					'stop-color' => array(),
-					'stop-opacity' => array(),
-					'stroke' => array(),
-					'stroke-dasharray' => array(),
-					'stroke-dashoffset' => array(),
-					'stroke-linecap' => array(),
-					'stroke-linejoin' => array(),
-					'stroke-miterlimit' => array(),
-					'stroke-opacity' => array(),
-					'stroke-width' => array(),
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
-					),
-					'systemlanguage' => array(),
-					'text-anchor' => array(),
-					'text-decoration' => array(),
-					'text-rendering' => array(),
-					'unicode-bidi' => array(),
-					'vector-effect' => array(),
-					'version' => array(
-						'value' => array(
-							'1.0',
-							'1.1',
-						),
-					),
-					'viewbox' => array(),
-					'visibility' => array(),
-					'width' => array(),
-					'word-spacing' => array(),
-					'writing-mode' => array(),
-					'x' => array(),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
-					'y' => array(),
-					'zoomandpan' => array(),
-				),
-				'tag_spec' => array(
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
-				),
+		),
+		'prefix' => array(),
+		'property' => array(),
+		'rel' => array(
+			'blacklisted_value_regex' => '(^|\\s)(canonical|components|dns-prefetch|import|manifest|preconnect|preload|prerender|serviceworker|stylesheet|subresource)(\\s|$)',
+		),
+		'resource' => array(),
+		'rev' => array(),
+		'role' => array(),
+		'slot' => array(),
+		'style' => array(
+			'blacklisted_value_regex' => '(!\\s*important|<!--)',
+		),
+		'subscriptions-action' => array(
+			'requires_extension' => array(
+				'amp-subscriptions',
 			),
 		),
-		'switch' => array(
-			array(
-				'attr_spec_list' => array(
-					'alignment-baseline' => array(),
-					'baseline-shift' => array(),
-					'clip' => array(),
-					'clip-path' => array(),
-					'clip-rule' => array(),
-					'color' => array(),
-					'color-interpolation' => array(),
-					'color-interpolation-filters' => array(),
-					'color-profile' => array(),
-					'color-rendering' => array(),
-					'cursor' => array(),
-					'direction' => array(),
-					'display' => array(),
-					'dominant-baseline' => array(),
-					'enable-background' => array(),
-					'fill' => array(),
-					'fill-opacity' => array(),
-					'fill-rule' => array(),
-					'filter' => array(),
-					'flood-color' => array(),
-					'flood-opacity' => array(),
-					'focusable' => array(),
-					'font-family' => array(),
-					'font-size' => array(),
-					'font-size-adjust' => array(),
-					'font-stretch' => array(),
-					'font-style' => array(),
-					'font-variant' => array(),
-					'font-weight' => array(),
-					'glyph-orientation-horizontal' => array(),
-					'glyph-orientation-vertical' => array(),
-					'image-rendering' => array(),
-					'kerning' => array(),
-					'letter-spacing' => array(),
-					'lighting-color' => array(),
-					'marker-end' => array(),
-					'marker-mid' => array(),
-					'marker-start' => array(),
-					'mask' => array(),
-					'opacity' => array(),
-					'overflow' => array(),
-					'pointer-events' => array(),
-					'requiredextensions' => array(),
-					'requiredfeatures' => array(),
-					'shape-rendering' => array(),
-					'stop-color' => array(),
-					'stop-opacity' => array(),
-					'stroke' => array(),
-					'stroke-dasharray' => array(),
-					'stroke-dashoffset' => array(),
-					'stroke-linecap' => array(),
-					'stroke-linejoin' => array(),
-					'stroke-miterlimit' => array(),
-					'stroke-opacity' => array(),
-					'stroke-width' => array(),
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
-					),
-					'systemlanguage' => array(),
-					'text-anchor' => array(),
-					'text-decoration' => array(),
-					'text-rendering' => array(),
-					'unicode-bidi' => array(),
-					'vector-effect' => array(),
-					'visibility' => array(),
-					'word-spacing' => array(),
-					'writing-mode' => array(),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
-				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'svg',
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
-				),
+		'subscriptions-actions' => array(
+			'requires_extension' => array(
+				'amp-subscriptions',
+			),
+			'value' => array(
+				'',
 			),
 		),
-		'symbol' => array(
-			array(
-				'attr_spec_list' => array(
-					'alignment-baseline' => array(),
-					'baseline-shift' => array(),
-					'clip' => array(),
-					'clip-path' => array(),
-					'clip-rule' => array(),
-					'color' => array(),
-					'color-interpolation' => array(),
-					'color-interpolation-filters' => array(),
-					'color-profile' => array(),
-					'color-rendering' => array(),
-					'cursor' => array(),
-					'direction' => array(),
-					'display' => array(),
-					'dominant-baseline' => array(),
-					'enable-background' => array(),
-					'externalresourcesrequired' => array(),
-					'fill' => array(),
-					'fill-opacity' => array(),
-					'fill-rule' => array(),
-					'filter' => array(),
-					'flood-color' => array(),
-					'flood-opacity' => array(),
-					'focusable' => array(),
-					'font-family' => array(),
-					'font-size' => array(),
-					'font-size-adjust' => array(),
-					'font-stretch' => array(),
-					'font-style' => array(),
-					'font-variant' => array(),
-					'font-weight' => array(),
-					'glyph-orientation-horizontal' => array(),
-					'glyph-orientation-vertical' => array(),
-					'height' => array(),
-					'image-rendering' => array(),
-					'kerning' => array(),
-					'letter-spacing' => array(),
-					'lighting-color' => array(),
-					'marker-end' => array(),
-					'marker-mid' => array(),
-					'marker-start' => array(),
-					'mask' => array(),
-					'opacity' => array(),
-					'overflow' => array(),
-					'pointer-events' => array(),
-					'preserveaspectratio' => array(),
-					'shape-rendering' => array(),
-					'stop-color' => array(),
-					'stop-opacity' => array(),
-					'stroke' => array(),
-					'stroke-dasharray' => array(),
-					'stroke-dashoffset' => array(),
-					'stroke-linecap' => array(),
-					'stroke-linejoin' => array(),
-					'stroke-miterlimit' => array(),
-					'stroke-opacity' => array(),
-					'stroke-width' => array(),
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
-					),
-					'text-anchor' => array(),
-					'text-decoration' => array(),
-					'text-rendering' => array(),
-					'unicode-bidi' => array(),
-					'vector-effect' => array(),
-					'viewbox' => array(),
-					'visibility' => array(),
-					'width' => array(),
-					'word-spacing' => array(),
-					'writing-mode' => array(),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
-				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'svg',
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
-				),
+		'subscriptions-decorate' => array(
+			'requires_extension' => array(
+				'amp-subscriptions',
 			),
 		),
-		'table' => array(
-			array(
-				'attr_spec_list' => array(
-					'align' => array(),
-					'bgcolor' => array(),
-					'border' => array(
-						'value' => array(
-							'0',
-							'1',
-						),
-					),
-					'cellpadding' => array(),
-					'cellspacing' => array(),
-					'sortable' => array(),
-					'width' => array(),
-				),
-				'tag_spec' => array(),
+		'subscriptions-dialog' => array(
+			'requires_extension' => array(
+				'amp-subscriptions',
 			),
-		),
-		'tbody' => array(
-			array(
-				'attr_spec_list' => array(),
-				'tag_spec' => array(),
+			'value' => array(
+				'',
 			),
 		),
-		'td' => array(
-			array(
-				'attr_spec_list' => array(
-					'align' => array(),
-					'bgcolor' => array(),
-					'colspan' => array(),
-					'headers' => array(),
-					'height' => array(),
-					'rowspan' => array(),
-					'valign' => array(),
-					'width' => array(),
-				),
-				'tag_spec' => array(),
+		'subscriptions-display' => array(
+			'requires_extension' => array(
+				'amp-subscriptions',
 			),
 		),
-		'template' => array(
-			array(
-				'attr_spec_list' => array(
-					'date-template' => array(
-						'dispatch_key' => 1,
-						'mandatory' => true,
-						'value' => array(
-							'',
-						),
-					),
-					'dates' => array(),
-					'default' => array(),
-					'type' => array(
-						'mandatory' => true,
-						'value' => array(
-							'amp-mustache',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-date-picker',
-					'requires_extension' => array(
-						'amp-mustache',
-					),
-					'spec_name' => 'amp-date-picker > template [date-template]',
-				),
+		'subscriptions-lang' => array(
+			'requires_extension' => array(
+				'amp-subscriptions',
 			),
-			array(
-				'attr_spec_list' => array(
-					'info-template' => array(
-						'dispatch_key' => 1,
-						'mandatory' => true,
-					),
-					'type' => array(
-						'mandatory' => true,
-						'value' => array(
-							'amp-mustache',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-date-picker',
-					'requires_extension' => array(
-						'amp-mustache',
-					),
-					'spec_name' => 'amp-date-picker > template [info-template]',
-				),
+		),
+		'subscriptions-section' => array(
+			'requires_extension' => array(
+				'amp-subscriptions',
 			),
-			array(
-				'attr_spec_list' => array(
-					'id' => array(
-						'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|AMP|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|i-amphtml-\\S*|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
-					),
-					'type' => array(
-						'mandatory' => true,
-						'value' => array(
-							'amp-mustache',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'disallowed_ancestor' => array(
-						'template',
-						'amp-date-picker',
-						'amp-story-auto-ads',
-						'form div [submit-success][template]',
-						'form div [submit-error][template]',
-						'form div [submitting][template]',
-						'form div [verify-error][template]',
-					),
-					'mandatory_ancestor' => 'body',
-					'requires_extension' => array(
-						'amp-mustache',
-					),
-				),
+			'value_casei' => array(
+				'actions',
+				'content',
+				'content-not-granted',
+				'loading',
 			),
-			array(
-				'attr_spec_list' => array(
-					'type' => array(
-						'dispatch_key' => 3,
-						'mandatory' => true,
-						'value' => array(
-							'amp-mustache',
-						),
-					),
-				),
-				'tag_spec' => array(
-					'descendant_tag_list' => 'amp-story-grid-layer-allowed-descendants',
-					'mandatory_parent' => 'amp-story-auto-ads',
-					'reference_points' => array(
-						'AMP-STORY-GRID-LAYER animate-in' => array(
-							'mandatory' => false,
-							'unique' => false,
-						),
-						'AMP-STORY-GRID-LAYER default' => array(
-							'mandatory' => false,
-							'unique' => false,
-						),
-					),
-					'requires_extension' => array(
-						'amp-mustache',
-					),
-					'spec_name' => 'amp-story-auto-ads > template',
-				),
+		),
+		'subscriptions-service' => array(
+			'requires_extension' => array(
+				'amp-subscriptions',
 			),
 		),
-		'text' => array(
-			array(
-				'attr_spec_list' => array(
-					'alignment-baseline' => array(),
-					'baseline-shift' => array(),
-					'clip' => array(),
-					'clip-path' => array(),
-					'clip-rule' => array(),
-					'color' => array(),
-					'color-interpolation' => array(),
-					'color-interpolation-filters' => array(),
-					'color-profile' => array(),
-					'color-rendering' => array(),
-					'cursor' => array(),
-					'direction' => array(),
-					'display' => array(),
-					'dominant-baseline' => array(),
-					'dx' => array(),
-					'dy' => array(),
-					'enable-background' => array(),
-					'externalresourcesrequired' => array(),
-					'fill' => array(),
-					'fill-opacity' => array(),
-					'fill-rule' => array(),
-					'filter' => array(),
-					'flood-color' => array(),
-					'flood-opacity' => array(),
-					'focusable' => array(),
-					'font-family' => array(),
-					'font-size' => array(),
-					'font-size-adjust' => array(),
-					'font-stretch' => array(),
-					'font-style' => array(),
-					'font-variant' => array(),
-					'font-weight' => array(),
-					'glyph-orientation-horizontal' => array(),
-					'glyph-orientation-vertical' => array(),
-					'image-rendering' => array(),
-					'kerning' => array(),
-					'lengthadjust' => array(),
-					'letter-spacing' => array(),
-					'lighting-color' => array(),
-					'marker-end' => array(),
-					'marker-mid' => array(),
-					'marker-start' => array(),
-					'mask' => array(),
-					'opacity' => array(),
-					'overflow' => array(),
-					'pointer-events' => array(),
-					'requiredextensions' => array(),
-					'requiredfeatures' => array(),
-					'rotate' => array(),
-					'shape-rendering' => array(),
-					'stop-color' => array(),
-					'stop-opacity' => array(),
-					'stroke' => array(),
-					'stroke-dasharray' => array(),
-					'stroke-dashoffset' => array(),
-					'stroke-linecap' => array(),
-					'stroke-linejoin' => array(),
-					'stroke-miterlimit' => array(),
-					'stroke-opacity' => array(),
-					'stroke-width' => array(),
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
-					),
-					'systemlanguage' => array(),
-					'text-anchor' => array(),
-					'text-decoration' => array(),
-					'text-rendering' => array(),
-					'textlength' => array(),
-					'transform' => array(),
-					'unicode-bidi' => array(),
-					'vector-effect' => array(),
-					'visibility' => array(),
-					'word-spacing' => array(),
-					'writing-mode' => array(),
-					'x' => array(),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
-					'y' => array(),
-				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'svg',
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
-				),
+		'tabindex' => array(),
+		'title' => array(),
+		'translate' => array(),
+		'typeof' => array(),
+		'validation-for' => array(),
+		'visible-when-invalid' => array(
+			'value' => array(
+				'badInput',
+				'customError',
+				'patternMismatch',
+				'rangeOverflow',
+				'rangeUnderflow',
+				'stepMismatch',
+				'tooLong',
+				'typeMismatch',
+				'valueMissing',
 			),
 		),
-		'textarea' => array(
-			array(
-				'attr_spec_list' => array(
-					'autocomplete' => array(),
-					'autoexpand' => array(
-						'requires_extension' => array(
-							'amp-form',
-						),
-					),
-					'autofocus' => array(),
-					'cols' => array(),
-					'data-amp-bind-autocomplete' => array(),
-					'data-amp-bind-autofocus' => array(),
-					'data-amp-bind-cols' => array(),
-					'data-amp-bind-defaulttext' => array(),
-					'data-amp-bind-disabled' => array(),
-					'data-amp-bind-maxlength' => array(),
-					'data-amp-bind-minlength' => array(),
-					'data-amp-bind-pattern' => array(),
-					'data-amp-bind-placeholder' => array(),
-					'data-amp-bind-readonly' => array(),
-					'data-amp-bind-required' => array(),
-					'data-amp-bind-rows' => array(),
-					'data-amp-bind-selectiondirection' => array(),
-					'data-amp-bind-selectionend' => array(),
-					'data-amp-bind-selectionstart' => array(),
-					'data-amp-bind-spellcheck' => array(),
-					'data-amp-bind-wrap' => array(),
-					'disabled' => array(),
-					'maxlength' => array(),
-					'minlength' => array(),
-					'name' => array(
-						'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
-					),
-					'no-verify' => array(
-						'value' => array(
-							'',
-						),
-					),
-					'pattern' => array(),
-					'placeholder' => array(),
-					'readonly' => array(),
-					'required' => array(),
-					'rows' => array(),
-					'selectiondirection' => array(),
-					'selectionend' => array(),
-					'selectionstart' => array(),
-					'spellcheck' => array(),
-					'wrap' => array(),
-				),
-				'tag_spec' => array(
-					'spec_url' => 'https://amp.dev/documentation/components/amp-form',
+		'vocab' => array(),
+	);
+
+
+	private static $reference_points = array(
+		'AMP-BASE-CAROUSEL lightbox [child]' => array(
+			'attr_spec_list' => array(
+				'lightbox-thumbnail-id' => array(
+					'value_regex_casei' => '^[a-z][a-z\\d_-]*',
 				),
 			),
+			'tag_spec' => array(
+				'spec_name' => 'AMP-BASE-CAROUSEL lightbox [child]',
+			),
 		),
-		'textpath' => array(
-			array(
-				'attr_spec_list' => array(
-					'alignment-baseline' => array(),
-					'baseline-shift' => array(),
-					'clip' => array(),
-					'clip-path' => array(),
-					'clip-rule' => array(),
-					'color' => array(),
-					'color-interpolation' => array(),
-					'color-interpolation-filters' => array(),
-					'color-profile' => array(),
-					'color-rendering' => array(),
-					'cursor' => array(),
-					'direction' => array(),
-					'display' => array(),
-					'dominant-baseline' => array(),
-					'enable-background' => array(),
-					'externalresourcesrequired' => array(),
-					'fill' => array(),
-					'fill-opacity' => array(),
-					'fill-rule' => array(),
-					'filter' => array(),
-					'flood-color' => array(),
-					'flood-opacity' => array(),
-					'focusable' => array(),
-					'font-family' => array(),
-					'font-size' => array(),
-					'font-size-adjust' => array(),
-					'font-stretch' => array(),
-					'font-style' => array(),
-					'font-variant' => array(),
-					'font-weight' => array(),
-					'glyph-orientation-horizontal' => array(),
-					'glyph-orientation-vertical' => array(),
-					'image-rendering' => array(),
-					'kerning' => array(),
-					'letter-spacing' => array(),
-					'lighting-color' => array(),
-					'marker-end' => array(),
-					'marker-mid' => array(),
-					'marker-start' => array(),
-					'mask' => array(),
-					'method' => array(),
-					'opacity' => array(),
-					'overflow' => array(),
-					'pointer-events' => array(),
-					'requiredextensions' => array(),
-					'requiredfeatures' => array(),
-					'shape-rendering' => array(),
-					'spacing' => array(),
-					'startoffset' => array(),
-					'stop-color' => array(),
-					'stop-opacity' => array(),
-					'stroke' => array(),
-					'stroke-dasharray' => array(),
-					'stroke-dashoffset' => array(),
-					'stroke-linecap' => array(),
-					'stroke-linejoin' => array(),
-					'stroke-miterlimit' => array(),
-					'stroke-opacity' => array(),
-					'stroke-width' => array(),
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
-					),
-					'systemlanguage' => array(),
-					'text-anchor' => array(),
-					'text-decoration' => array(),
-					'text-rendering' => array(),
-					'unicode-bidi' => array(),
-					'vector-effect' => array(),
-					'visibility' => array(),
-					'word-spacing' => array(),
-					'writing-mode' => array(),
-					'xlink:actuate' => array(),
-					'xlink:arcrole' => array(),
-					'xlink:href' => array(
-						'alternative_names' => array(
-							'href',
-						),
-						'value_url' => array(
-							'allow_empty' => false,
-							'protocol' => array(
-								'http',
-								'https',
-							),
-						),
-					),
-					'xlink:role' => array(),
-					'xlink:show' => array(),
-					'xlink:title' => array(),
-					'xlink:type' => array(),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
+		'AMP-BASE-CAROUSEL lightbox [lightbox-exclude]' => array(
+			'attr_spec_list' => array(
+				'lightbox-exclude' => array(
+					'mandatory' => true,
 				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'svg',
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
+			),
+			'tag_spec' => array(
+				'spec_name' => 'AMP-BASE-CAROUSEL lightbox [lightbox-exclude]',
+			),
+		),
+		'AMP-CAROUSEL lightbox [child]' => array(
+			'attr_spec_list' => array(
+				'lightbox-thumbnail-id' => array(
+					'value_regex_casei' => '^[a-z][a-z\\d_-]*',
 				),
 			),
+			'tag_spec' => array(
+				'spec_name' => 'AMP-CAROUSEL lightbox [child]',
+			),
 		),
-		'tfoot' => array(
-			array(
-				'attr_spec_list' => array(),
-				'tag_spec' => array(),
+		'AMP-CAROUSEL lightbox [lightbox-exclude]' => array(
+			'attr_spec_list' => array(
+				'lightbox-exclude' => array(
+					'mandatory' => true,
+				),
+			),
+			'tag_spec' => array(
+				'spec_name' => 'AMP-CAROUSEL lightbox [lightbox-exclude]',
 			),
 		),
-		'th' => array(
-			array(
-				'attr_spec_list' => array(
-					'abbr' => array(),
-					'align' => array(),
-					'bgcolor' => array(),
-					'colspan' => array(),
-					'headers' => array(),
-					'height' => array(),
-					'rowspan' => array(),
-					'scope' => array(),
-					'sorted' => array(),
-					'valign' => array(),
-					'width' => array(),
+		'AMP-LIVE-LIST [items]' => array(
+			'attr_spec_list' => array(
+				'items' => array(
+					'mandatory' => true,
 				),
-				'tag_spec' => array(),
+			),
+			'tag_spec' => array(
+				'reference_points' => array(
+					'AMP-LIVE-LIST [items] item' => array(
+						'mandatory' => false,
+						'unique' => false,
+					),
+				),
+				'spec_name' => 'AMP-LIVE-LIST [items]',
+				'spec_url' => 'https://amp.dev/documentation/components/amp-live-list#items',
 			),
 		),
-		'thead' => array(
-			array(
-				'attr_spec_list' => array(),
-				'tag_spec' => array(),
+		'AMP-LIVE-LIST [items] item' => array(
+			'attr_spec_list' => array(
+				'data-sort-time' => array(
+					'mandatory' => true,
+				),
+				'data-tombstone' => array(),
+				'data-update-time' => array(),
+				'id' => array(
+					'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|AMP|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|i-amphtml-\\S*|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
+					'mandatory' => true,
+				),
+			),
+			'tag_spec' => array(
+				'spec_name' => 'AMP-LIVE-LIST [items] item',
+				'spec_url' => 'https://amp.dev/documentation/components/amp-live-list#items',
 			),
 		),
-		'time' => array(
-			array(
-				'attr_spec_list' => array(
-					'datetime' => array(),
+		'AMP-LIVE-LIST [pagination]' => array(
+			'attr_spec_list' => array(
+				'pagination' => array(
+					'mandatory' => true,
 				),
-				'tag_spec' => array(),
+			),
+			'tag_spec' => array(
+				'spec_name' => 'AMP-LIVE-LIST [pagination]',
+				'spec_url' => 'https://amp.dev/documentation/components/amp-live-list#pagination',
 			),
 		),
-		'title' => array(
-			array(
-				'attr_spec_list' => array(
-					'data-amp-bind-text' => array(),
-				),
-				'tag_spec' => array(
-					'spec_name' => 'title',
+		'AMP-LIVE-LIST [update]' => array(
+			'attr_spec_list' => array(
+				'update' => array(
+					'mandatory' => true,
 				),
 			),
-			array(
-				'attr_spec_list' => array(
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
-					),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
-				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'svg',
-					'spec_name' => 'svg title',
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
-				),
+			'tag_spec' => array(
+				'spec_name' => 'AMP-LIVE-LIST [update]',
+				'spec_url' => 'https://amp.dev/documentation/components/amp-live-list#update',
 			),
 		),
-		'tr' => array(
-			array(
-				'attr_spec_list' => array(
-					'align' => array(),
-					'bgcolor' => array(),
-					'height' => array(),
-					'valign' => array(),
+		'AMP-NEXT-PAGE > [separator]' => array(
+			'attr_spec_list' => array(
+				'separator' => array(
+					'mandatory' => true,
 				),
-				'tag_spec' => array(),
+			),
+			'tag_spec' => array(
+				'mandatory_parent' => 'amp-next-page',
+				'spec_name' => 'AMP-NEXT-PAGE > [separator]',
 			),
 		),
-		'track' => array(
-			array(
-				'attr_spec_list' => array(
-					'default' => array(
-						'value' => array(
-							'',
-						),
-					),
-					'kind' => array(
-						'value' => array(
-							'captions',
-							'chapters',
-							'descriptions',
-							'metadata',
-						),
+		'AMP-SELECTOR child' => array(
+			'attr_spec_list' => array(),
+			'tag_spec' => array(
+				'reference_points' => array(
+					'AMP-SELECTOR child' => array(
+						'mandatory' => false,
+						'unique' => false,
 					),
-					'label' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'mandatory' => true,
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'https',
-							),
-						),
+					'AMP-SELECTOR option' => array(
+						'mandatory' => false,
+						'unique' => false,
 					),
-					'srclang' => array(),
-				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'audio',
-					'spec_name' => 'audio > track',
 				),
+				'spec_name' => 'AMP-SELECTOR child',
 			),
-			array(
-				'attr_spec_list' => array(
-					'default' => array(
-						'value' => array(
-							'',
-						),
-					),
-					'kind' => array(
-						'mandatory' => true,
-						'value_casei' => array(
-							'subtitles',
-						),
-					),
-					'label' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'mandatory' => true,
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'https',
-							),
-						),
-					),
-					'srclang' => array(
-						'mandatory' => true,
+		),
+		'AMP-SELECTOR option' => array(
+			'attr_spec_list' => array(
+				'disabled' => array(
+					'value' => array(
+						'',
 					),
 				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'audio',
-					'spec_name' => 'audio > track[kind=subtitles]',
+				'option' => array(
+					'mandatory' => true,
 				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'default' => array(
-						'value' => array(
-							'',
-						),
-					),
-					'kind' => array(
-						'value' => array(
-							'captions',
-							'chapters',
-							'descriptions',
-							'metadata',
-						),
-					),
-					'label' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'mandatory' => true,
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'https',
-							),
-						),
+				'selected' => array(
+					'value' => array(
+						'',
 					),
-					'srclang' => array(),
-				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'video',
-					'spec_name' => 'video > track',
 				),
 			),
-			array(
-				'attr_spec_list' => array(
-					'default' => array(
-						'value' => array(
-							'',
-						),
-					),
-					'kind' => array(
-						'mandatory' => true,
-						'value_casei' => array(
-							'subtitles',
-						),
-					),
-					'label' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'mandatory' => true,
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'https',
-							),
-						),
-					),
-					'srclang' => array(
-						'mandatory' => true,
+			'tag_spec' => array(
+				'spec_name' => 'AMP-SELECTOR option',
+				'spec_url' => 'https://amp.dev/documentation/components/amp-selector',
+			),
+		),
+		'AMP-STORY-CTA-LAYER animate-in' => array(
+			'attr_spec_list' => array(
+				'animate-in' => array(
+					'value' => array(
+						'drop',
+						'fade-in',
+						'fly-in-bottom',
+						'fly-in-left',
+						'fly-in-right',
+						'fly-in-top',
+						'pan-down',
+						'pan-left',
+						'pan-right',
+						'pan-up',
+						'pulse',
+						'rotate-in-left',
+						'rotate-in-right',
+						'twirl-in',
+						'whoosh-in-left',
+						'whoosh-in-right',
+						'zoom-in',
+						'zoom-out',
 					),
 				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'video',
-					'spec_name' => 'video > track[kind=subtitles]',
+				'animate-in-after' => array(),
+				'animate-in-delay' => array(),
+				'animate-in-duration' => array(),
+				'animate-in-timing-function' => array(),
+				'scale-end' => array(
+					'value_regex' => '[0-9]+([.][0-9]+)?',
 				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'data-amp-bind-label' => array(),
-					'data-amp-bind-src' => array(),
-					'data-amp-bind-srclang' => array(),
-					'default' => array(
-						'value' => array(
-							'',
-						),
-					),
-					'kind' => array(
-						'value' => array(
-							'captions',
-							'chapters',
-							'descriptions',
-							'metadata',
-						),
-					),
-					'label' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'mandatory' => true,
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'https',
-							),
-						),
-					),
-					'srclang' => array(),
+				'scale-start' => array(
+					'value_regex' => '[0-9]+([.][0-9]+)?',
 				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-audio',
-					'spec_name' => 'amp-audio > track',
+				'translate-x' => array(
+					'value_regex_casei' => '[0-9]+px',
+				),
+				'translate-y' => array(
+					'value_regex_casei' => '[0-9]+px',
 				),
 			),
-			array(
-				'attr_spec_list' => array(
-					'data-amp-bind-label' => array(),
-					'data-amp-bind-src' => array(),
-					'data-amp-bind-srclang' => array(),
-					'default' => array(
-						'value' => array(
-							'',
-						),
-					),
-					'kind' => array(
-						'mandatory' => true,
-						'value_casei' => array(
-							'subtitles',
-						),
-					),
-					'label' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'mandatory' => true,
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'https',
-							),
-						),
-					),
-					'srclang' => array(
-						'mandatory' => true,
+			'tag_spec' => array(
+				'reference_points' => array(
+					'AMP-STORY-CTA-LAYER animate-in' => array(
+						'mandatory' => false,
+						'unique' => false,
 					),
 				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-audio',
-					'spec_name' => 'amp-audio > track[kind=subtitles]',
-				),
+				'spec_name' => 'AMP-STORY-CTA-LAYER animate-in',
+				'spec_url' => 'https://amp.dev/documentation/components/amp-story',
 			),
-			array(
-				'attr_spec_list' => array(
-					'data-amp-bind-label' => array(),
-					'data-amp-bind-src' => array(),
-					'data-amp-bind-srclang' => array(),
-					'default' => array(
-						'value' => array(
-							'',
-						),
+		),
+		'AMP-STORY-GRID-LAYER animate-in' => array(
+			'attr_spec_list' => array(
+				'animate-in' => array(
+					'value' => array(
+						'drop',
+						'fade-in',
+						'fly-in-bottom',
+						'fly-in-left',
+						'fly-in-right',
+						'fly-in-top',
+						'pan-down',
+						'pan-left',
+						'pan-right',
+						'pan-up',
+						'pulse',
+						'rotate-in-left',
+						'rotate-in-right',
+						'twirl-in',
+						'whoosh-in-left',
+						'whoosh-in-right',
+						'zoom-in',
+						'zoom-out',
 					),
-					'kind' => array(
-						'value' => array(
-							'captions',
-							'chapters',
-							'descriptions',
-							'metadata',
+				),
+				'animate-in-after' => array(),
+				'animate-in-delay' => array(),
+				'animate-in-duration' => array(),
+				'animate-in-timing-function' => array(),
+				'data-tooltip-icon' => array(
+					'value_url' => array(
+						'protocol' => array(
+							'http',
+							'https',
+							'data',
 						),
 					),
-					'label' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'mandatory' => true,
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'https',
-							),
-						),
+				),
+				'interactive' => array(
+					'value' => array(
+						'',
 					),
-					'srclang' => array(),
 				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-video',
-					'spec_name' => 'amp-video > track',
+				'scale-end' => array(
+					'value_regex' => '[0-9]+([.][0-9]+)?',
 				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'data-amp-bind-label' => array(),
-					'data-amp-bind-src' => array(),
-					'data-amp-bind-srclang' => array(),
-					'default' => array(
-						'value' => array(
-							'',
-						),
-					),
-					'kind' => array(
-						'mandatory' => true,
-						'value_casei' => array(
-							'subtitles',
-						),
-					),
-					'label' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'mandatory' => true,
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'https',
-							),
-						),
-					),
-					'srclang' => array(
-						'mandatory' => true,
+				'scale-start' => array(
+					'value_regex' => '[0-9]+([.][0-9]+)?',
+				),
+				'target' => array(
+					'value' => array(
+						'_blank',
 					),
 				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-video',
-					'spec_name' => 'amp-video > track[kind=subtitles]',
+				'translate-x' => array(
+					'value_regex_casei' => '[0-9]+px',
+				),
+				'translate-y' => array(
+					'value_regex_casei' => '[0-9]+px',
 				),
 			),
-			array(
-				'attr_spec_list' => array(
-					'data-amp-bind-label' => array(),
-					'data-amp-bind-src' => array(),
-					'data-amp-bind-srclang' => array(),
-					'default' => array(
-						'value' => array(
-							'',
-						),
+			'tag_spec' => array(
+				'reference_points' => array(
+					'AMP-STORY-GRID-LAYER animate-in' => array(
+						'mandatory' => false,
+						'unique' => false,
 					),
-					'kind' => array(
-						'value' => array(
-							'captions',
-							'chapters',
-							'descriptions',
-							'metadata',
-						),
+				),
+				'spec_name' => 'AMP-STORY-GRID-LAYER animate-in',
+				'spec_url' => 'https://amp.dev/documentation/components/amp-story',
+			),
+		),
+		'AMP-STORY-GRID-LAYER default' => array(
+			'attr_spec_list' => array(
+				'align-content' => array(
+					'value' => array(
+						'center',
+						'end',
+						'space-around',
+						'space-between',
+						'space-evenly',
+						'start',
+						'stretch',
 					),
-					'label' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'mandatory' => true,
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'https',
-							),
-						),
+				),
+				'align-items' => array(
+					'value' => array(
+						'center',
+						'end',
+						'start',
+						'stretch',
 					),
-					'srclang' => array(),
 				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-ima-video',
-					'spec_name' => 'amp-ima-video > track',
+				'align-self' => array(
+					'value' => array(
+						'center',
+						'end',
+						'start',
+						'stretch',
+					),
 				),
-			),
-			array(
-				'attr_spec_list' => array(
-					'data-amp-bind-label' => array(),
-					'data-amp-bind-src' => array(),
-					'data-amp-bind-srclang' => array(),
-					'default' => array(
-						'value' => array(
-							'',
-						),
+				'animate-in' => array(
+					'value' => array(
+						'drop',
+						'fade-in',
+						'fly-in-bottom',
+						'fly-in-left',
+						'fly-in-right',
+						'fly-in-top',
+						'pan-down',
+						'pan-left',
+						'pan-right',
+						'pan-up',
+						'pulse',
+						'rotate-in-left',
+						'rotate-in-right',
+						'twirl-in',
+						'whoosh-in-left',
+						'whoosh-in-right',
+						'zoom-in',
+						'zoom-out',
 					),
-					'kind' => array(
-						'mandatory' => true,
-						'value_casei' => array(
-							'subtitles',
+				),
+				'animate-in-after' => array(),
+				'animate-in-delay' => array(),
+				'animate-in-duration' => array(),
+				'animate-in-timing-function' => array(),
+				'data-tooltip-icon' => array(
+					'value_url' => array(
+						'protocol' => array(
+							'http',
+							'https',
+							'data',
 						),
 					),
-					'label' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'mandatory' => true,
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'https',
-							),
-						),
+				),
+				'grid-area' => array(),
+				'interactive' => array(
+					'value' => array(
+						'',
 					),
-					'srclang' => array(
-						'mandatory' => true,
+				),
+				'justify-content' => array(
+					'value' => array(
+						'center',
+						'end',
+						'space-around',
+						'space-between',
+						'space-evenly',
+						'start',
+						'stretch',
 					),
 				),
-				'tag_spec' => array(
-					'mandatory_parent' => 'amp-ima-video',
-					'spec_name' => 'amp-ima-video > track[kind=subtitles]',
-					'spec_url' => 'https://amp.dev/documentation/components/amp-ima-video',
+				'justify-items' => array(
+					'value' => array(
+						'center',
+						'end',
+						'start',
+						'stretch',
+					),
 				),
-			),
-		),
-		'tref' => array(
-			array(
-				'attr_spec_list' => array(
-					'alignment-baseline' => array(),
-					'baseline-shift' => array(),
-					'clip' => array(),
-					'clip-path' => array(),
-					'clip-rule' => array(),
-					'color' => array(),
-					'color-interpolation' => array(),
-					'color-interpolation-filters' => array(),
-					'color-profile' => array(),
-					'color-rendering' => array(),
-					'cursor' => array(),
-					'direction' => array(),
-					'display' => array(),
-					'dominant-baseline' => array(),
-					'enable-background' => array(),
-					'externalresourcesrequired' => array(),
-					'fill' => array(),
-					'fill-opacity' => array(),
-					'fill-rule' => array(),
-					'filter' => array(),
-					'flood-color' => array(),
-					'flood-opacity' => array(),
-					'focusable' => array(),
-					'font-family' => array(),
-					'font-size' => array(),
-					'font-size-adjust' => array(),
-					'font-stretch' => array(),
-					'font-style' => array(),
-					'font-variant' => array(),
-					'font-weight' => array(),
-					'glyph-orientation-horizontal' => array(),
-					'glyph-orientation-vertical' => array(),
-					'image-rendering' => array(),
-					'kerning' => array(),
-					'letter-spacing' => array(),
-					'lighting-color' => array(),
-					'marker-end' => array(),
-					'marker-mid' => array(),
-					'marker-start' => array(),
-					'mask' => array(),
-					'opacity' => array(),
-					'overflow' => array(),
-					'pointer-events' => array(),
-					'requiredextensions' => array(),
-					'requiredfeatures' => array(),
-					'shape-rendering' => array(),
-					'stop-color' => array(),
-					'stop-opacity' => array(),
-					'stroke' => array(),
-					'stroke-dasharray' => array(),
-					'stroke-dashoffset' => array(),
-					'stroke-linecap' => array(),
-					'stroke-linejoin' => array(),
-					'stroke-miterlimit' => array(),
-					'stroke-opacity' => array(),
-					'stroke-width' => array(),
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
+				'justify-self' => array(
+					'value' => array(
+						'center',
+						'end',
+						'start',
+						'stretch',
 					),
-					'systemlanguage' => array(),
-					'text-anchor' => array(),
-					'text-decoration' => array(),
-					'text-rendering' => array(),
-					'unicode-bidi' => array(),
-					'vector-effect' => array(),
-					'visibility' => array(),
-					'word-spacing' => array(),
-					'writing-mode' => array(),
-					'xlink:actuate' => array(),
-					'xlink:arcrole' => array(),
-					'xlink:href' => array(
-						'alternative_names' => array(
-							'href',
-						),
-						'value_url' => array(
-							'allow_empty' => false,
-							'protocol' => array(
-								'http',
-								'https',
-							),
-						),
+				),
+				'scale-end' => array(
+					'value_regex' => '[0-9]+([.][0-9]+)?',
+				),
+				'scale-start' => array(
+					'value_regex' => '[0-9]+([.][0-9]+)?',
+				),
+				'target' => array(
+					'value' => array(
+						'_blank',
 					),
-					'xlink:role' => array(),
-					'xlink:show' => array(),
-					'xlink:title' => array(),
-					'xlink:type' => array(),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
 				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'svg',
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
+				'translate-x' => array(
+					'value_regex_casei' => '[0-9]+px',
+				),
+				'translate-y' => array(
+					'value_regex_casei' => '[0-9]+px',
 				),
 			),
-		),
-		'tspan' => array(
-			array(
-				'attr_spec_list' => array(
-					'alignment-baseline' => array(),
-					'baseline-shift' => array(),
-					'clip' => array(),
-					'clip-path' => array(),
-					'clip-rule' => array(),
-					'color' => array(),
-					'color-interpolation' => array(),
-					'color-interpolation-filters' => array(),
-					'color-profile' => array(),
-					'color-rendering' => array(),
-					'cursor' => array(),
-					'direction' => array(),
-					'display' => array(),
-					'dominant-baseline' => array(),
-					'dx' => array(),
-					'dy' => array(),
-					'enable-background' => array(),
-					'externalresourcesrequired' => array(),
-					'fill' => array(),
-					'fill-opacity' => array(),
-					'fill-rule' => array(),
-					'filter' => array(),
-					'flood-color' => array(),
-					'flood-opacity' => array(),
-					'focusable' => array(),
-					'font-family' => array(),
-					'font-size' => array(),
-					'font-size-adjust' => array(),
-					'font-stretch' => array(),
-					'font-style' => array(),
-					'font-variant' => array(),
-					'font-weight' => array(),
-					'glyph-orientation-horizontal' => array(),
-					'glyph-orientation-vertical' => array(),
-					'image-rendering' => array(),
-					'kerning' => array(),
-					'lengthadjust' => array(),
-					'letter-spacing' => array(),
-					'lighting-color' => array(),
-					'marker-end' => array(),
-					'marker-mid' => array(),
-					'marker-start' => array(),
-					'mask' => array(),
-					'opacity' => array(),
-					'overflow' => array(),
-					'pointer-events' => array(),
-					'requiredextensions' => array(),
-					'requiredfeatures' => array(),
-					'rotate' => array(),
-					'shape-rendering' => array(),
-					'stop-color' => array(),
-					'stop-opacity' => array(),
-					'stroke' => array(),
-					'stroke-dasharray' => array(),
-					'stroke-dashoffset' => array(),
-					'stroke-linecap' => array(),
-					'stroke-linejoin' => array(),
-					'stroke-miterlimit' => array(),
-					'stroke-opacity' => array(),
-					'stroke-width' => array(),
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
-					),
-					'systemlanguage' => array(),
-					'text-anchor' => array(),
-					'text-decoration' => array(),
-					'text-rendering' => array(),
-					'textlength' => array(),
-					'unicode-bidi' => array(),
-					'vector-effect' => array(),
-					'visibility' => array(),
-					'word-spacing' => array(),
-					'writing-mode' => array(),
-					'x' => array(),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
-					'y' => array(),
+			'tag_spec' => array(
+				'reference_points' => array(
+					'AMP-STORY-GRID-LAYER animate-in' => array(
+						'mandatory' => false,
+						'unique' => false,
+					),
 				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'svg',
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
+				'spec_name' => 'AMP-STORY-GRID-LAYER default',
+				'spec_url' => 'https://amp.dev/documentation/components/amp-story',
+			),
+		),
+		'AMP-VIDEO-IFRAME > [placeholder]' => array(
+			'attr_spec_list' => array(
+				'placeholder' => array(
+					'mandatory' => true,
 				),
 			),
+			'tag_spec' => array(
+				'spec_name' => 'AMP-VIDEO-IFRAME > [placeholder]',
+				'spec_url' => 'https://amp.dev/documentation/components/amp-video-iframe',
+			),
 		),
-		'tt' => array(
-			array(
-				'attr_spec_list' => array(),
-				'tag_spec' => array(),
+	);
+
+
+	private static $extension_specs = array(
+		'amp-3d-gltf' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'u' => array(
-			array(
-				'attr_spec_list' => array(),
-				'tag_spec' => array(),
+		'amp-3q-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'ul' => array(
-			array(
-				'attr_spec_list' => array(),
-				'tag_spec' => array(),
+		'amp-access' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'use' => array(
-			array(
-				'attr_spec_list' => array(
-					'alignment-baseline' => array(),
-					'baseline-shift' => array(),
-					'clip' => array(),
-					'clip-path' => array(),
-					'clip-rule' => array(),
-					'color' => array(),
-					'color-interpolation' => array(),
-					'color-interpolation-filters' => array(),
-					'color-profile' => array(),
-					'color-rendering' => array(),
-					'cursor' => array(),
-					'direction' => array(),
-					'display' => array(),
-					'dominant-baseline' => array(),
-					'enable-background' => array(),
-					'externalresourcesrequired' => array(),
-					'fill' => array(),
-					'fill-opacity' => array(),
-					'fill-rule' => array(),
-					'filter' => array(),
-					'flood-color' => array(),
-					'flood-opacity' => array(),
-					'focusable' => array(),
-					'font-family' => array(),
-					'font-size' => array(),
-					'font-size-adjust' => array(),
-					'font-stretch' => array(),
-					'font-style' => array(),
-					'font-variant' => array(),
-					'font-weight' => array(),
-					'glyph-orientation-horizontal' => array(),
-					'glyph-orientation-vertical' => array(),
-					'height' => array(),
-					'image-rendering' => array(),
-					'kerning' => array(),
-					'letter-spacing' => array(),
-					'lighting-color' => array(),
-					'marker-end' => array(),
-					'marker-mid' => array(),
-					'marker-start' => array(),
-					'mask' => array(),
-					'opacity' => array(),
-					'overflow' => array(),
-					'pointer-events' => array(),
-					'requiredextensions' => array(),
-					'requiredfeatures' => array(),
-					'shape-rendering' => array(),
-					'stop-color' => array(),
-					'stop-opacity' => array(),
-					'stroke' => array(),
-					'stroke-dasharray' => array(),
-					'stroke-dashoffset' => array(),
-					'stroke-linecap' => array(),
-					'stroke-linejoin' => array(),
-					'stroke-miterlimit' => array(),
-					'stroke-opacity' => array(),
-					'stroke-width' => array(),
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
-					),
-					'systemlanguage' => array(),
-					'text-anchor' => array(),
-					'text-decoration' => array(),
-					'text-rendering' => array(),
-					'transform' => array(),
-					'unicode-bidi' => array(),
-					'vector-effect' => array(),
-					'visibility' => array(),
-					'width' => array(),
-					'word-spacing' => array(),
-					'writing-mode' => array(),
-					'x' => array(),
-					'xlink:actuate' => array(),
-					'xlink:arcrole' => array(),
-					'xlink:href' => array(
-						'alternative_names' => array(
-							'href',
-						),
-						'value_url' => array(
-							'allow_empty' => false,
-							'protocol' => array(
-								'http',
-								'https',
-							),
-						),
-					),
-					'xlink:role' => array(),
-					'xlink:show' => array(),
-					'xlink:title' => array(),
-					'xlink:type' => array(),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
-					'y' => array(),
-				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'svg',
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
-				),
+		'amp-access-laterpay' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
+				'0.2',
+			),
+		),
+		'amp-access-poool' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-access-scroll' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-accordion' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-action-macro' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-ad' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-ad-custom' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-addthis' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-analytics' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-anim' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-animation' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-apester-media' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-app-banner' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-audio' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-auto-ads' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-autocomplete' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-base-carousel' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-beopinion' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-bind' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-bodymovin-animation' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-brid-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-brightcove' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-byside-content' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-call-tracking' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-carousel' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+				'0.2',
+			),
+		),
+		'amp-connatix-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-consent' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-dailymotion' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-date-countdown' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-date-display' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-date-picker' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-delight-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-dynamic-css-classes' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-embedly-card' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-experiment' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+				'1.0',
+			),
+		),
+		'amp-facebook' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-facebook-comments' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-facebook-like' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-facebook-page' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-fit-text' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-font' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-form' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'var' => array(
-			array(
-				'attr_spec_list' => array(),
-				'tag_spec' => array(),
+		'amp-fx-collection' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'video' => array(
-			array(
-				'attr_spec_list' => array(
-					'autoplay' => array(),
-					'controls' => array(),
-					'height' => array(),
-					'loop' => array(),
-					'muted' => array(),
-					'playsinline' => array(),
-					'poster' => array(),
-					'preload' => array(),
-					'src' => array(
-						'blacklisted_value_regex' => '__amp_source_origin',
-						'value_url' => array(
-							'allow_relative' => false,
-							'protocol' => array(
-								'data',
-								'https',
-							),
-						),
-					),
-					'width' => array(),
-				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'noscript',
-					'mandatory_ancestor_suggested_alternative' => 'amp-video',
-					'spec_url' => 'https://amp.dev/documentation/components/amp-video',
-				),
+		'amp-fx-flying-carpet' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'view' => array(
-			array(
-				'attr_spec_list' => array(
-					'externalresourcesrequired' => array(),
-					'preserveaspectratio' => array(),
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
-					),
-					'viewbox' => array(),
-					'viewtarget' => array(),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
-					'zoomandpan' => array(),
-				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'svg',
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
-				),
+		'amp-geo' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'vkern' => array(
-			array(
-				'attr_spec_list' => array(
-					'g1' => array(),
-					'g2' => array(),
-					'k' => array(),
-					'style' => array(
-						'blacklisted_value_regex' => '!\\s*important',
-					),
-					'u1' => array(),
-					'u2' => array(),
-					'xml:lang' => array(),
-					'xml:space' => array(),
-					'xmlns' => array(),
-					'xmlns:xlink' => array(),
-				),
-				'tag_spec' => array(
-					'mandatory_ancestor' => 'svg',
-					'spec_url' => 'https://amp.dev/documentation/guides-and-tutorials/learn/spec/amphtml#svg',
-				),
+		'amp-gfycat' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'wbr' => array(
-			array(
-				'attr_spec_list' => array(),
-				'tag_spec' => array(),
+		'amp-gist' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-	);
-
-	private static $layout_allowed_attrs = array(
-		'data-amp-bind-height' => array(),
-		'data-amp-bind-width' => array(),
-		'height' => array(),
-		'heights' => array(),
-		'layout' => array(),
-		'sizes' => array(),
-		'width' => array(),
-	);
-
-
-	private static $globally_allowed_attrs = array(
-		'about' => array(),
-		'accesskey' => array(),
-		'amp-access' => array(),
-		'amp-access-behavior' => array(),
-		'amp-access-hide' => array(),
-		'amp-access-id' => array(),
-		'amp-access-loader' => array(),
-		'amp-access-loading' => array(),
-		'amp-access-off' => array(),
-		'amp-access-on' => array(),
-		'amp-access-show' => array(),
-		'amp-access-style' => array(),
-		'amp-access-template' => array(),
-		'amp-fx' => array(
-			'requires_extension' => array(
-				'amp-fx-collection',
+		'amp-google-document-embed' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'value_regex_casei' => '(fade-in|fade-in-scroll|float-in-bottom|float-in-top|fly-in-bottom|fly-in-left|fly-in-right|fly-in-top|parallax)(\\s|fade-in|fade-in-scroll|float-in-bottom|float-in-top|fly-in-bottom|fly-in-left|fly-in-right|fly-in-top|parallax)*',
 		),
-		'aria-activedescendant' => array(),
-		'aria-atomic' => array(),
-		'aria-autocomplete' => array(),
-		'aria-busy' => array(),
-		'aria-checked' => array(),
-		'aria-controls' => array(),
-		'aria-current' => array(),
-		'aria-describedby' => array(),
-		'aria-disabled' => array(),
-		'aria-dropeffect' => array(),
-		'aria-expanded' => array(),
-		'aria-flowto' => array(),
-		'aria-grabbed' => array(),
-		'aria-haspopup' => array(),
-		'aria-hidden' => array(),
-		'aria-invalid' => array(),
-		'aria-label' => array(),
-		'aria-labelledby' => array(),
-		'aria-level' => array(),
-		'aria-live' => array(),
-		'aria-multiline' => array(),
-		'aria-multiselectable' => array(),
-		'aria-orientation' => array(),
-		'aria-owns' => array(),
-		'aria-posinset' => array(),
-		'aria-pressed' => array(),
-		'aria-readonly' => array(),
-		'aria-relevant' => array(),
-		'aria-required' => array(),
-		'aria-selected' => array(),
-		'aria-setsize' => array(),
-		'aria-sort' => array(),
-		'aria-valuemax' => array(),
-		'aria-valuemin' => array(),
-		'aria-valuenow' => array(),
-		'aria-valuetext' => array(),
-		'autoscroll' => array(),
-		'class' => array(
-			'blacklisted_value_regex' => '(^|\\W)i-amphtml-',
+		'amp-hulu' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
 		),
-		'content' => array(),
-		'data-amp-bind-aria-activedescendant' => array(),
-		'data-amp-bind-aria-atomic' => array(),
-		'data-amp-bind-aria-autocomplete' => array(),
-		'data-amp-bind-aria-busy' => array(),
-		'data-amp-bind-aria-checked' => array(),
-		'data-amp-bind-aria-controls' => array(),
-		'data-amp-bind-aria-describedby' => array(),
-		'data-amp-bind-aria-disabled' => array(),
-		'data-amp-bind-aria-dropeffect' => array(),
-		'data-amp-bind-aria-expanded' => array(),
-		'data-amp-bind-aria-flowto' => array(),
-		'data-amp-bind-aria-grabbed' => array(),
-		'data-amp-bind-aria-haspopup' => array(),
-		'data-amp-bind-aria-hidden' => array(),
-		'data-amp-bind-aria-invalid' => array(),
-		'data-amp-bind-aria-label' => array(),
-		'data-amp-bind-aria-labelledby' => array(),
-		'data-amp-bind-aria-level' => array(),
-		'data-amp-bind-aria-live' => array(),
-		'data-amp-bind-aria-multiline' => array(),
-		'data-amp-bind-aria-multiselectable' => array(),
-		'data-amp-bind-aria-orientation' => array(),
-		'data-amp-bind-aria-owns' => array(),
-		'data-amp-bind-aria-posinset' => array(),
-		'data-amp-bind-aria-pressed' => array(),
-		'data-amp-bind-aria-readonly' => array(),
-		'data-amp-bind-aria-relevant' => array(),
-		'data-amp-bind-aria-required' => array(),
-		'data-amp-bind-aria-selected' => array(),
-		'data-amp-bind-aria-setsize' => array(),
-		'data-amp-bind-aria-sort' => array(),
-		'data-amp-bind-aria-valuemax' => array(),
-		'data-amp-bind-aria-valuemin' => array(),
-		'data-amp-bind-aria-valuenow' => array(),
-		'data-amp-bind-aria-valuetext' => array(),
-		'data-amp-bind-class' => array(),
-		'data-amp-bind-hidden' => array(),
-		'data-amp-bind-text' => array(),
-		'datatype' => array(),
-		'dir' => array(),
-		'draggable' => array(),
-		'fallback' => array(
-			'value' => array(
-				'',
+		'amp-iframe' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'hidden' => array(
-			'value' => array(
-				'',
+		'amp-ima-video' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'i-amp-access-id' => array(),
-		'id' => array(
-			'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|AMP|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|i-amphtml-\\S*|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
+		'amp-image-lightbox' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
 		),
-		'inlist' => array(),
-		'itemid' => array(),
-		'itemprop' => array(),
-		'itemref' => array(),
-		'itemscope' => array(),
-		'itemtype' => array(),
-		'lang' => array(),
-		'on' => array(),
-		'overflow' => array(),
-		'placeholder' => array(
-			'value' => array(
-				'',
+		'amp-image-slider' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'prefix' => array(),
-		'property' => array(),
-		'rel' => array(
-			'blacklisted_value_regex' => '(^|\\s)(canonical|components|dns-prefetch|import|manifest|preconnect|preload|prerender|serviceworker|stylesheet|subresource)(\\s|$)',
+		'amp-imgur' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
 		),
-		'resource' => array(),
-		'rev' => array(),
-		'role' => array(),
-		'slot' => array(),
-		'style' => array(
-			'blacklisted_value_regex' => '(!\\s*important|<!--)',
+		'amp-inputmask' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-instagram' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-install-serviceworker' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-izlesene' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-jwplayer' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-kaltura-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-lightbox' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-lightbox-gallery' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-link-rewriter' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
 		),
-		'subscriptions-action' => array(
-			'requires_extension' => array(
-				'amp-subscriptions',
+		'amp-list' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'subscriptions-actions' => array(
-			'requires_extension' => array(
-				'amp-subscriptions',
+		'amp-live-list' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'value' => array(
-				'',
+		),
+		'amp-mathml' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'subscriptions-decorate' => array(
-			'requires_extension' => array(
-				'amp-subscriptions',
+		'amp-megaphone' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'subscriptions-dialog' => array(
-			'requires_extension' => array(
-				'amp-subscriptions',
+		'amp-minute-media-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'value' => array(
-				'',
+		),
+		'amp-mowplayer' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'subscriptions-display' => array(
-			'requires_extension' => array(
-				'amp-subscriptions',
+		'amp-mustache' => array(
+			'extension_type' => 2,
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+				'0.2',
 			),
 		),
-		'subscriptions-lang' => array(
-			'requires_extension' => array(
-				'amp-subscriptions',
+		'amp-next-page' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'subscriptions-section' => array(
-			'requires_extension' => array(
-				'amp-subscriptions',
+		'amp-nexxtv-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'value_casei' => array(
-				'actions',
-				'content',
-				'content-not-granted',
-				'loading',
+		),
+		'amp-o2-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'subscriptions-service' => array(
-			'requires_extension' => array(
-				'amp-subscriptions',
+		'amp-ooyala-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'tabindex' => array(),
-		'title' => array(),
-		'translate' => array(),
-		'typeof' => array(),
-		'validation-for' => array(),
-		'visible-when-invalid' => array(
-			'value' => array(
-				'badInput',
-				'customError',
-				'patternMismatch',
-				'rangeOverflow',
-				'rangeUnderflow',
-				'stepMismatch',
-				'tooLong',
-				'typeMismatch',
-				'valueMissing',
+		'amp-orientation-observer' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'vocab' => array(),
-	);
-
-
-	private static $reference_points = array(
-		'AMP-BASE-CAROUSEL lightbox [child]' => array(
-			'attr_spec_list' => array(
-				'lightbox-thumbnail-id' => array(
-					'value_regex_casei' => '^[a-z][a-z\\d_-]*',
-				),
+		'amp-pan-zoom' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'spec_name' => 'AMP-BASE-CAROUSEL lightbox [child]',
+		),
+		'amp-pinterest' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-BASE-CAROUSEL lightbox [lightbox-exclude]' => array(
-			'attr_spec_list' => array(
-				'lightbox-exclude' => array(
-					'mandatory' => true,
-				),
+		'amp-playbuzz' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'spec_name' => 'AMP-BASE-CAROUSEL lightbox [lightbox-exclude]',
+		),
+		'amp-position-observer' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-CAROUSEL lightbox [child]' => array(
-			'attr_spec_list' => array(
-				'lightbox-thumbnail-id' => array(
-					'value_regex_casei' => '^[a-z][a-z\\d_-]*',
-				),
+		'amp-powr-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'spec_name' => 'AMP-CAROUSEL lightbox [child]',
+		),
+		'amp-reach-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-CAROUSEL lightbox [lightbox-exclude]' => array(
-			'attr_spec_list' => array(
-				'lightbox-exclude' => array(
-					'mandatory' => true,
-				),
+		'amp-recaptcha-input' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'spec_name' => 'AMP-CAROUSEL lightbox [lightbox-exclude]',
+		),
+		'amp-reddit' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-LIVE-LIST [items]' => array(
-			'attr_spec_list' => array(
-				'items' => array(
-					'mandatory' => true,
-				),
+		'amp-riddle-quiz' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'reference_points' => array(
-					'AMP-LIVE-LIST [items] item' => array(
-						'mandatory' => false,
-						'unique' => false,
-					),
-				),
-				'spec_name' => 'AMP-LIVE-LIST [items]',
-				'spec_url' => 'https://amp.dev/documentation/components/amp-live-list#items',
+		),
+		'amp-script' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-LIVE-LIST [items] item' => array(
-			'attr_spec_list' => array(
-				'data-sort-time' => array(
-					'mandatory' => true,
-				),
-				'data-tombstone' => array(),
-				'data-update-time' => array(),
-				'id' => array(
-					'blacklisted_value_regex' => '(^|\\s)(__amp_\\S*|__count__|__defineGetter__|__defineSetter__|__lookupGetter__|__lookupSetter__|__noSuchMethod__|__parent__|__proto__|__AMP_\\S*|\\$p|\\$proxy|acceptCharset|addEventListener|appendChild|assignedSlot|attachShadow|AMP|baseURI|checkValidity|childElementCount|childNodes|classList|className|clientHeight|clientLeft|clientTop|clientWidth|compareDocumentPosition|computedName|computedRole|contentEditable|createShadowRoot|enqueAction|firstChild|firstElementChild|getAnimations|getAttribute|getAttributeNS|getAttributeNode|getAttributeNodeNS|getBoundingClientRect|getClientRects|getDestinationInsertionPoints|getElementsByClassName|getElementsByTagName|getElementsByTagNameNS|getRootNode|hasAttribute|hasAttributeNS|hasAttributes|hasChildNodes|hasPointerCapture|i-amphtml-\\S*|innerHTML|innerText|inputMode|insertAdjacentElement|insertAdjacentHTML|insertAdjacentText|isContentEditable|isDefaultNamespace|isEqualNode|isSameNode|lastChild|lastElementChild|lookupNamespaceURI|namespaceURI|nextElementSibling|nextSibling|nodeName|nodeType|nodeValue|offsetHeight|offsetLeft|offsetParent|offsetTop|offsetWidth|outerHTML|outerText|ownerDocument|parentElement|parentNode|previousElementSibling|previousSibling|querySelector|querySelectorAll|releasePointerCapture|removeAttribute|removeAttributeNS|removeAttributeNode|removeChild|removeEventListener|replaceChild|reportValidity|requestPointerLock|scrollHeight|scrollIntoView|scrollIntoViewIfNeeded|scrollLeft|scrollWidth|setAttribute|setAttributeNS|setAttributeNode|setAttributeNodeNS|setPointerCapture|shadowRoot|styleMap|tabIndex|tagName|textContent|toString|valueOf|(webkit|ms|moz|o)dropzone|(webkit|moz|ms|o)MatchesSelector|(webkit|moz|ms|o)RequestFullScreen|(webkit|moz|ms|o)RequestFullscreen)(\\s|$)',
-					'mandatory' => true,
-				),
+		'amp-selector' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'spec_name' => 'AMP-LIVE-LIST [items] item',
-				'spec_url' => 'https://amp.dev/documentation/components/amp-live-list#items',
+		),
+		'amp-sidebar' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-LIVE-LIST [pagination]' => array(
-			'attr_spec_list' => array(
-				'pagination' => array(
-					'mandatory' => true,
-				),
+		'amp-skimlinks' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'spec_name' => 'AMP-LIVE-LIST [pagination]',
-				'spec_url' => 'https://amp.dev/documentation/components/amp-live-list#pagination',
+		),
+		'amp-smartlinks' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-LIVE-LIST [update]' => array(
-			'attr_spec_list' => array(
-				'update' => array(
-					'mandatory' => true,
-				),
+		'amp-social-share' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'spec_name' => 'AMP-LIVE-LIST [update]',
-				'spec_url' => 'https://amp.dev/documentation/components/amp-live-list#update',
+		),
+		'amp-soundcloud' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-NEXT-PAGE > [separator]' => array(
-			'attr_spec_list' => array(
-				'separator' => array(
-					'mandatory' => true,
-				),
+		'amp-springboard-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'mandatory_parent' => 'amp-next-page',
-				'spec_name' => 'AMP-NEXT-PAGE > [separator]',
+		),
+		'amp-sticky-ad' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+				'1.0',
 			),
 		),
-		'AMP-SELECTOR child' => array(
-			'attr_spec_list' => array(),
-			'tag_spec' => array(
-				'reference_points' => array(
-					'AMP-SELECTOR child' => array(
-						'mandatory' => false,
-						'unique' => false,
-					),
-					'AMP-SELECTOR option' => array(
-						'mandatory' => false,
-						'unique' => false,
-					),
-				),
-				'spec_name' => 'AMP-SELECTOR child',
+		'amp-story' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'1.0',
 			),
 		),
-		'AMP-SELECTOR option' => array(
-			'attr_spec_list' => array(
-				'disabled' => array(
-					'value' => array(
-						'',
-					),
-				),
-				'option' => array(
-					'mandatory' => true,
-				),
-				'selected' => array(
-					'value' => array(
-						'',
-					),
-				),
+		'amp-story-auto-ads' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'spec_name' => 'AMP-SELECTOR option',
-				'spec_url' => 'https://amp.dev/documentation/components/amp-selector',
+		),
+		'amp-subscriptions' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-STORY-CTA-LAYER animate-in' => array(
-			'attr_spec_list' => array(
-				'animate-in' => array(
-					'value' => array(
-						'drop',
-						'fade-in',
-						'fly-in-bottom',
-						'fly-in-left',
-						'fly-in-right',
-						'fly-in-top',
-						'pan-down',
-						'pan-left',
-						'pan-right',
-						'pan-up',
-						'pulse',
-						'rotate-in-left',
-						'rotate-in-right',
-						'twirl-in',
-						'whoosh-in-left',
-						'whoosh-in-right',
-						'zoom-in',
-						'zoom-out',
-					),
-				),
-				'animate-in-after' => array(),
-				'animate-in-delay' => array(),
-				'animate-in-duration' => array(),
-				'animate-in-timing-function' => array(),
-				'scale-end' => array(
-					'value_regex' => '[0-9]+([.][0-9]+)?',
-				),
-				'scale-start' => array(
-					'value_regex' => '[0-9]+([.][0-9]+)?',
-				),
-				'translate-x' => array(
-					'value_regex_casei' => '[0-9]+px',
-				),
-				'translate-y' => array(
-					'value_regex_casei' => '[0-9]+px',
-				),
+		'amp-subscriptions-google' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-timeago' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-truncate-text' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'reference_points' => array(
-					'AMP-STORY-CTA-LAYER animate-in' => array(
-						'mandatory' => false,
-						'unique' => false,
-					),
-				),
-				'spec_name' => 'AMP-STORY-CTA-LAYER animate-in',
-				'spec_url' => 'https://amp.dev/documentation/components/amp-story',
+		),
+		'amp-twitter' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-STORY-GRID-LAYER animate-in' => array(
-			'attr_spec_list' => array(
-				'animate-in' => array(
-					'value' => array(
-						'drop',
-						'fade-in',
-						'fly-in-bottom',
-						'fly-in-left',
-						'fly-in-right',
-						'fly-in-top',
-						'pan-down',
-						'pan-left',
-						'pan-right',
-						'pan-up',
-						'pulse',
-						'rotate-in-left',
-						'rotate-in-right',
-						'twirl-in',
-						'whoosh-in-left',
-						'whoosh-in-right',
-						'zoom-in',
-						'zoom-out',
-					),
-				),
-				'animate-in-after' => array(),
-				'animate-in-delay' => array(),
-				'animate-in-duration' => array(),
-				'animate-in-timing-function' => array(),
-				'data-tooltip-icon' => array(
-					'value_url' => array(
-						'protocol' => array(
-							'http',
-							'https',
-							'data',
-						),
-					),
-				),
-				'interactive' => array(
-					'value' => array(
-						'',
-					),
-				),
-				'scale-end' => array(
-					'value_regex' => '[0-9]+([.][0-9]+)?',
-				),
-				'scale-start' => array(
-					'value_regex' => '[0-9]+([.][0-9]+)?',
-				),
-				'target' => array(
-					'value' => array(
-						'_blank',
-					),
-				),
-				'translate-x' => array(
-					'value_regex_casei' => '[0-9]+px',
-				),
-				'translate-y' => array(
-					'value_regex_casei' => '[0-9]+px',
-				),
+		'amp-user-location' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'reference_points' => array(
-					'AMP-STORY-GRID-LAYER animate-in' => array(
-						'mandatory' => false,
-						'unique' => false,
-					),
-				),
-				'spec_name' => 'AMP-STORY-GRID-LAYER animate-in',
-				'spec_url' => 'https://amp.dev/documentation/components/amp-story',
+		),
+		'amp-user-notification' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-STORY-GRID-LAYER default' => array(
-			'attr_spec_list' => array(
-				'align-content' => array(
-					'value' => array(
-						'center',
-						'end',
-						'space-around',
-						'space-between',
-						'space-evenly',
-						'start',
-						'stretch',
-					),
-				),
-				'align-items' => array(
-					'value' => array(
-						'center',
-						'end',
-						'start',
-						'stretch',
-					),
-				),
-				'align-self' => array(
-					'value' => array(
-						'center',
-						'end',
-						'start',
-						'stretch',
-					),
-				),
-				'animate-in' => array(
-					'value' => array(
-						'drop',
-						'fade-in',
-						'fly-in-bottom',
-						'fly-in-left',
-						'fly-in-right',
-						'fly-in-top',
-						'pan-down',
-						'pan-left',
-						'pan-right',
-						'pan-up',
-						'pulse',
-						'rotate-in-left',
-						'rotate-in-right',
-						'twirl-in',
-						'whoosh-in-left',
-						'whoosh-in-right',
-						'zoom-in',
-						'zoom-out',
-					),
-				),
-				'animate-in-after' => array(),
-				'animate-in-delay' => array(),
-				'animate-in-duration' => array(),
-				'animate-in-timing-function' => array(),
-				'data-tooltip-icon' => array(
-					'value_url' => array(
-						'protocol' => array(
-							'http',
-							'https',
-							'data',
-						),
-					),
-				),
-				'grid-area' => array(),
-				'interactive' => array(
-					'value' => array(
-						'',
-					),
-				),
-				'justify-content' => array(
-					'value' => array(
-						'center',
-						'end',
-						'space-around',
-						'space-between',
-						'space-evenly',
-						'start',
-						'stretch',
-					),
-				),
-				'justify-items' => array(
-					'value' => array(
-						'center',
-						'end',
-						'start',
-						'stretch',
-					),
-				),
-				'justify-self' => array(
-					'value' => array(
-						'center',
-						'end',
-						'start',
-						'stretch',
-					),
-				),
-				'scale-end' => array(
-					'value_regex' => '[0-9]+([.][0-9]+)?',
-				),
-				'scale-start' => array(
-					'value_regex' => '[0-9]+([.][0-9]+)?',
-				),
-				'target' => array(
-					'value' => array(
-						'_blank',
-					),
-				),
-				'translate-x' => array(
-					'value_regex_casei' => '[0-9]+px',
-				),
-				'translate-y' => array(
-					'value_regex_casei' => '[0-9]+px',
-				),
+		'amp-video' => array(
+			'requires_usage' => false,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'reference_points' => array(
-					'AMP-STORY-GRID-LAYER animate-in' => array(
-						'mandatory' => false,
-						'unique' => false,
-					),
-				),
-				'spec_name' => 'AMP-STORY-GRID-LAYER default',
-				'spec_url' => 'https://amp.dev/documentation/components/amp-story',
+		),
+		'amp-video-docking' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
-		'AMP-VIDEO-IFRAME > [placeholder]' => array(
-			'attr_spec_list' => array(
-				'placeholder' => array(
-					'mandatory' => true,
-				),
+		'amp-video-iframe' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
-			'tag_spec' => array(
-				'spec_name' => 'AMP-VIDEO-IFRAME > [placeholder]',
-				'spec_url' => 'https://amp.dev/documentation/components/amp-video-iframe',
+		),
+		'amp-vimeo' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-vine' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-viqeo-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-vk' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-web-push' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-wistia-player' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-yotpo' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
+			),
+		),
+		'amp-youtube' => array(
+			'requires_usage' => true,
+			'version' => array(
+				'0.1',
 			),
 		),
 	);
@@ -17713,22 +15382,27 @@ public static function get_allowed_tags() {
 	 *
 	 * @since 1.5
 	 * @internal
+	 *
 	 * @return array Extension specs, keyed by extension name.
 	 */
 	public static function get_extension_specs() {
-		static $extension_specs = [];
-
-		if ( ! empty( $extension_specs ) ) {
-			return $extension_specs;
-		}
+		return self::$extension_specs;
+	}
 
-		foreach ( self::get_allowed_tag( 'script' ) as $script_spec ) {
-			if ( isset( $script_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec'] ) ) {
-				$extension_specs[ $script_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec']['name'] ] = $script_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec'];
-			}
+	/**
+	 * Get extension specs.
+	 *
+	 * @since 1.5
+	 * @internal
+	 *
+	 * @param string $name Extension name.
+	 * @return array Extension specs, keyed by extension name.
+	 */
+	public static function get_extension_spec( $name ) {
+		if ( isset( self::$extension_specs[ $name ] ) ) {
+			return self::$extension_specs[ $name ];
 		}
-
-		return $extension_specs;
+		return null;
 	}
 
 	/**
@@ -17738,23 +15412,23 @@ public static function get_extension_specs() {
 	 *
 	 * @since 0.7
 	 *
-	 * @param string      $node_name Tag name.
+	 * @param string      $tag_name  Tag name.
 	 * @param string|null $spec_name Spec name.
-	 * @return array|null Allowed tag, or null if the tag does not exist.
+	 * @return array[]|array|null Allowed tags, allowed tag spec, or null if the tag does not exist.
 	 */
-	public static function get_allowed_tag( $node_name, $spec_name = null ) {
-		if ( isset( self::$allowed_tags[ $node_name ] ) ) {
-			$rule_specs = self::$allowed_tags[ $node_name ];
+	public static function get_allowed_tag( $tag_name, $spec_name = null ) {
+		if ( isset( self::$allowed_tags[ $tag_name ] ) ) {
+			$rule_specs = self::$allowed_tags[ $tag_name ];
 			if ( empty( $spec_name ) ) {
 				return $rule_specs;
 			}
 			foreach ( $rule_specs as $rule_spec ) {
 				if (
-					( ! isset( $rule_spec['tag_spec']['spec_name'] ) && $node_name === $spec_name )
+					( ! isset( $rule_spec['tag_spec']['spec_name'] ) && $tag_name === $spec_name )
 					||
 					( isset( $rule_spec['tag_spec']['spec_name'] ) && $rule_spec['tag_spec']['spec_name'] === $spec_name )
 				) {
-					return $rule_spec;
+					return array_merge( compact( 'tag_name' ), $rule_spec );
 				}
 			}
 		}
diff --git a/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php b/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
index e81c72e0e01..532806bb989 100644
--- a/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
+++ b/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
@@ -376,34 +376,6 @@ private function sanitize_element( DOMElement $element ) {
 	 */
 	private function get_rule_spec_list_to_validate( DOMElement $node, $rule_spec ) {
 
-		// Expand extension_spec into a set of attr_spec_list.
-		if ( isset( $rule_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec'] ) ) {
-			$extension_spec = $rule_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec'];
-
-			if ( isset( $rule_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec']['extension_type'] ) && 2 === $rule_spec[ AMP_Rule_Spec::TAG_SPEC ]['extension_spec']['extension_type'] ) {
-				$custom_attr = 'custom-template';
-			} else {
-				$custom_attr = 'custom-element';
-			}
-
-			$rule_spec[ AMP_Rule_Spec::ATTR_SPEC_LIST ][ $custom_attr ] = [
-				AMP_Rule_Spec::VALUE     => $extension_spec['name'],
-				AMP_Rule_Spec::MANDATORY => true,
-			];
-
-			$rule_spec[ AMP_Rule_Spec::ATTR_SPEC_LIST ]['src'] = [
-				AMP_Rule_Spec::VALUE_REGEX => implode(
-					'',
-					[
-						'^',
-						preg_quote( 'https://cdn.ampproject.org/v0/' . $extension_spec['name'] . '-' ), // phpcs:ignore WordPress.PHP.PregQuoteDelimiter.Missing
-						'(' . implode( '|', array_merge( $extension_spec['version'], [ 'latest' ] ) ) . ')',
-						'\.js$',
-					]
-				),
-			];
-		}
-
 		// Augment the attribute list according to the parent's reference points, if it has them.
 		if ( ! empty( $node->parentNode ) && isset( $this->allowed_tags[ $node->parentNode->nodeName ] ) ) {
 			foreach ( $this->allowed_tags[ $node->parentNode->nodeName ] as $parent_rule_spec ) {
@@ -468,16 +440,62 @@ private function process_node( DOMElement $node ) {
 		 */
 		$rule_spec_list_to_validate = [];
 		$validation_errors          = [];
-		$rule_spec_list             = $this->allowed_tags[ $node->nodeName ];
-		foreach ( $rule_spec_list as $id => $rule_spec ) {
-			$validity = $this->validate_tag_spec_for_node( $node, $rule_spec[ AMP_Rule_Spec::TAG_SPEC ] );
-			if ( true === $validity ) {
-				$rule_spec_list_to_validate[ $id ] = $this->get_rule_spec_list_to_validate( $node, $rule_spec );
-			} else {
-				$validation_errors[] = array_merge(
-					$validity,
-					[ 'spec_name' => $this->get_spec_name( $node, $rule_spec[ AMP_Rule_Spec::TAG_SPEC ] ) ]
-				);
+
+		if ( 'script' === $node->nodeName && ( $node->hasAttribute( 'custom-element' ) || $node->hasAttribute( 'custom-template' ) ) ) {
+			$extension_name = $node->hasAttribute( 'custom-element' ) ? $node->getAttribute( 'custom-element' ) : $node->getAttribute( 'custom-template' );
+			$extension_spec = AMP_Allowed_Tags_Generated::get_extension_spec( $extension_name );
+			if ( $extension_spec ) {
+				$attr_spec_list = [
+					'async' => [
+						'mandatory' => true,
+						'value'     => '',
+					],
+					'nonce' => [],
+					'type'  => [
+						'value_casei' => [
+							'text/javascript',
+						],
+					],
+				];
+
+				if ( isset( $extension_spec['extension_type'] ) && 2 === $extension_spec['extension_type'] ) {
+					$custom_attr = 'custom-template';
+				} else {
+					$custom_attr = 'custom-element';
+				}
+				$attr_spec_list[ $custom_attr ] = [
+					'value'     => $extension_name,
+					'mandatory' => true,
+				];
+
+				$attr_spec_list['src'] = [
+					AMP_Rule_Spec::VALUE_REGEX => implode(
+						'',
+						[
+							'^',
+							preg_quote( 'https://cdn.ampproject.org/v0/' . $extension_name . '-' ), // phpcs:ignore WordPress.PHP.PregQuoteDelimiter.Missing
+							'(' . implode( '|', array_merge( $extension_spec['version'], [ 'latest' ] ) ) . ')',
+							'\.js$',
+						]
+					),
+				];
+
+				$rule_spec_list_to_validate[] = [
+					'attr_spec_list' => $attr_spec_list,
+					'tag_spec'       => compact( 'extension_spec' ),
+				];
+			}
+		} elseif ( isset( $this->allowed_tags[ $node->nodeName ] ) ) {
+			foreach ( $this->allowed_tags[ $node->nodeName ] as $id => $rule_spec ) {
+				$validity = $this->validate_tag_spec_for_node( $node, $rule_spec[ AMP_Rule_Spec::TAG_SPEC ] );
+				if ( true === $validity ) {
+					$rule_spec_list_to_validate[ $id ] = $this->get_rule_spec_list_to_validate( $node, $rule_spec );
+				} else {
+					$validation_errors[] = array_merge(
+						$validity,
+						[ 'spec_name' => $this->get_spec_name( $node, $rule_spec[ AMP_Rule_Spec::TAG_SPEC ] ) ]
+					);
+				}
 			}
 		}
 
@@ -1057,11 +1075,7 @@ private function get_spec_name( DOMElement $element, $tag_spec ) {
 		if ( isset( $tag_spec['spec_name'] ) ) {
 			return $tag_spec['spec_name'];
 		} elseif ( isset( $tag_spec['extension_spec']['name'] ) ) {
-			return sprintf(
-				'script[%s=%s]',
-				isset( $tag_spec['extension_spec']['extension_type'] ) && 2 === $tag_spec['extension_spec']['extension_type'] ? 'custom-template' : 'custom-element',
-				strtolower( $tag_spec['extension_spec']['name'] )
-			);
+			return sprintf( 'script %s', strtolower( $tag_spec['extension_spec']['name'] ) );
 		} else {
 			return $element->nodeName;
 		}

From 365bcc8c2629fa6e83f528f1c57fceff2a535666 Mon Sep 17 00:00:00 2001
From: Weston Ruter <westonruter@google.com>
Date: Mon, 25 Nov 2019 22:30:52 -0800
Subject: [PATCH 4/5] Eliminate duplicated copy of spec in memory

---
 .../class-amp-tag-and-attribute-sanitizer.php | 26 ++++++++-----------
 1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php b/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
index 532806bb989..2dfee75c5c7 100644
--- a/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
+++ b/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
@@ -152,28 +152,25 @@ class AMP_Tag_And_Attribute_Sanitizer extends AMP_Base_Sanitizer {
 	 * @param array    $args Args.
 	 */
 	public function __construct( $dom, $args = [] ) {
-		// @todo It is pointless to have this DEFAULT_ARGS copying the array values. We should only get the data from AMP_Allowed_Tags_Generated.
-		$this->DEFAULT_ARGS = [
-			'amp_allowed_tags'                => AMP_Allowed_Tags_Generated::get_allowed_tags(),
-			'amp_globally_allowed_attributes' => AMP_Allowed_Tags_Generated::get_allowed_attributes(),
-			'amp_layout_allowed_attributes'   => AMP_Allowed_Tags_Generated::get_layout_attributes(),
-		];
-
 		parent::__construct( $dom, $args );
 
+		$this->allowed_tags                = AMP_Allowed_Tags_Generated::get_allowed_tags();
+		$this->globally_allowed_attributes = AMP_Allowed_Tags_Generated::get_allowed_attributes();
+		$this->layout_allowed_attributes   = AMP_Allowed_Tags_Generated::get_layout_attributes();
+
 		// @todo AMP dev mode should eventually be used instead of allow_dirty_styles.
 		if ( ! empty( $this->args['allow_dirty_styles'] ) ) {
 
 			// Allow style attribute on all elements.
-			$this->args['amp_globally_allowed_attributes']['style'] = [];
+			$this->globally_allowed_attributes['style'] = [];
 
 			// Remove restrictions on use of !important.
-			foreach ( $this->args['amp_allowed_tags']['style'] as &$style ) {
+			foreach ( $this->allowed_tags['style'] as &$style ) {
 				$style['cdata'] = [];
 			}
 
 			// Allow style elements.
-			$this->args['amp_allowed_tags']['style'][] = [
+			$this->allowed_tags['style'][] = [
 				'attr_spec_list' => [
 					'type' => [
 						'value_casei' => 'text/css',
@@ -186,7 +183,7 @@ public function __construct( $dom, $args = [] ) {
 			];
 
 			// Allow stylesheet links.
-			$this->args['amp_allowed_tags']['link'][] = [
+			$this->allowed_tags['link'][] = [
 				'attr_spec_list' => [
 					'async'       => [],
 					'crossorigin' => [],
@@ -213,7 +210,7 @@ public function __construct( $dom, $args = [] ) {
 		// @todo AMP dev mode should eventually be used instead of allow_dirty_scripts.
 		// Allow scripts if requested.
 		if ( ! empty( $this->args['allow_dirty_scripts'] ) ) {
-			$this->args['amp_allowed_tags']['script'][] = [
+			$this->allowed_tags['script'][] = [
 				'attr_spec_list' => [
 					'type'  => [],
 					'src'   => [],
@@ -228,7 +225,6 @@ public function __construct( $dom, $args = [] ) {
 		}
 
 		// Prepare whitelists.
-		$this->allowed_tags = $this->args['amp_allowed_tags'];
 		foreach ( AMP_Rule_Spec::$additional_allowed_tags as $tag_name => $tag_rule_spec ) {
 			$this->allowed_tags[ $tag_name ][] = $tag_rule_spec;
 		}
@@ -254,8 +250,8 @@ public function __construct( $dom, $args = [] ) {
 
 		unset( $tag_specs );
 
-		$this->globally_allowed_attributes = $this->process_alternate_names( $this->args['amp_globally_allowed_attributes'] );
-		$this->layout_allowed_attributes   = $this->process_alternate_names( $this->args['amp_layout_allowed_attributes'] );
+		$this->globally_allowed_attributes = $this->process_alternate_names( $this->globally_allowed_attributes );
+		$this->layout_allowed_attributes   = $this->process_alternate_names( $this->layout_allowed_attributes );
 	}
 
 	/**

From 5933df31aa863721f4327ebd1284ab7e2a75dd4a Mon Sep 17 00:00:00 2001
From: Weston Ruter <westonruter@google.com>
Date: Mon, 25 Nov 2019 22:38:01 -0800
Subject: [PATCH 5/5] Eliminate unused AMP_Rule_Spec::$additional_allowed_tags

---
 includes/sanitizers/class-amp-rule-spec.php        | 14 --------------
 .../class-amp-tag-and-attribute-sanitizer.php      |  8 --------
 2 files changed, 22 deletions(-)

diff --git a/includes/sanitizers/class-amp-rule-spec.php b/includes/sanitizers/class-amp-rule-spec.php
index 42c035cfda5..6e06622ab2e 100644
--- a/includes/sanitizers/class-amp-rule-spec.php
+++ b/includes/sanitizers/class-amp-rule-spec.php
@@ -144,18 +144,4 @@ abstract class AMP_Rule_Spec {
 		'typemustmatch',
 		'visible',
 	];
-
-	/**
-	 * Additional allowed tags.
-	 *
-	 * @var array
-	 */
-	public static $additional_allowed_tags = [
-
-		// An experimental tag with no protoascii.
-		'amp-share-tracking' => [
-			'attr_spec_list' => [],
-			'tag_spec'       => [],
-		],
-	];
 }
diff --git a/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php b/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
index 2dfee75c5c7..45ff5e97221 100644
--- a/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
+++ b/includes/sanitizers/class-amp-tag-and-attribute-sanitizer.php
@@ -224,17 +224,11 @@ public function __construct( $dom, $args = [] ) {
 			];
 		}
 
-		// Prepare whitelists.
-		foreach ( AMP_Rule_Spec::$additional_allowed_tags as $tag_name => $tag_rule_spec ) {
-			$this->allowed_tags[ $tag_name ][] = $tag_rule_spec;
-		}
-
 		// @todo Do the same for body when !use_document_element?
 		if ( ! empty( $this->args['use_document_element'] ) ) {
 			foreach ( $this->allowed_tags['html'] as &$rule_spec ) {
 				unset( $rule_spec[ AMP_Rule_Spec::TAG_SPEC ][ AMP_Rule_Spec::MANDATORY_PARENT ] );
 			}
-
 			unset( $rule_spec );
 		}
 
@@ -244,10 +238,8 @@ public function __construct( $dom, $args = [] ) {
 					$tag_spec[ AMP_Rule_Spec::ATTR_SPEC_LIST ] = $this->process_alternate_names( $tag_spec[ AMP_Rule_Spec::ATTR_SPEC_LIST ] );
 				}
 			}
-
 			unset( $tag_spec );
 		}
-
 		unset( $tag_specs );
 
 		$this->globally_allowed_attributes = $this->process_alternate_names( $this->globally_allowed_attributes );