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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>
Element Index | HTML5 Doctor </title>
<link rel="stylesheet" href="http://html5doctor.com/wp-content/themes/html5doctor2/style.css" media="screen" />
<!--[if IE]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
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<link rel="alternate" type="application/rss+xml" title="HTML5 Doctor » Element Index Comments Feed" href="http://html5doctor.com/element-index/feed/" />
<link rel='stylesheet' id='contact-form-7-css' href='http://html5doctor.com/wp-content/plugins/contact-form-7/styles.css?ver=3.0.2.1' type='text/css' media='all' />
<link rel='stylesheet' id='wp-pagenavi-css' href='http://html5doctor.com/wp-content/plugins/wp-pagenavi/pagenavi-css.css?ver=2.70' type='text/css' media='all' />
<script type='text/javascript' src='http://html5doctor.com/wp-includes/js/jquery/jquery.js?ver=1.7.1'></script>
<link rel="EditURI" type="application/rsd+xml" title="RSD" href="http://html5doctor.com/xmlrpc.php?rsd" />
<link rel='prev' title='Search Results' href='http://html5doctor.com/search/' />
<link rel='next' title='HTML5 Doctor Resources' href='http://html5doctor.com/resources/' />
<link rel='canonical' href='http://html5doctor.com/element-index/' />
<script type="text/javascript">
//<![CDATA[
var _wpcf7 = { cached: 1 };
//]]>
</script>
<style type="text/css">.recentcomments a{display:inline !important;padding:0 !important;margin:0 !important;}</style>
</head>
<body class="page page-id-3270 page-template page-template-glossary-php" id="com-html5doctor">
<header role="banner">
<div class="inner group">
<a href="http://html5doctor.com" rel="home"><div>
<hgroup>
<h1>HTML5 Doctor</h1>
<h2>Helping you implement HTML5 today</h2>
</hgroup><!-- end hgroup -->
</div></a><!-- wrapper div for Firefox 3.x ref: http://01i.jp/html5bll -->
<ul id="menu-top-nav" class="semantic-list"><li id="menu-item-3272" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-3272"><a href="http://html5doctor.com/about/">About</a></li>
<li id="menu-item-3275" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-3275"><a href="http://feeds2.feedburner.com/html5doctor">RSS</a></li>
<li id="menu-item-3276" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-3276"><a href="http://feeds.feedburner.com/HTML5DoctorComments">Comments RSS</a></li>
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<ul class="sub-menu">
<li id="menu-item-3273" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-3273"><a href="http://html5gallery.com">HTML5 Gallery</a></li>
<li id="menu-item-3580" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-3580"><a href="http://docteurhtml5.com/html5/">Docteur HTML5</a></li>
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</ul>
</li>
</ul> <!-- end #top-nav -->
<nav>
<ul id="menu-main_nav" class=""><li id="menu-item-3297" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-3297"><a href="/">Home</a></li>
<li id="menu-item-3250" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-3250"><a href="http://html5doctor.com/article-archive/">Article Archive</a></li>
<li id="menu-item-3291" class="menu-item menu-item-type-post_type menu-item-object-page current-menu-item page_item page-item-3270 current_page_item menu-item-3291"><a href="http://html5doctor.com/element-index/">Element Index</a></li>
<li id="menu-item-3252" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-3252"><a href="http://html5doctor.com/ask-the-doctor/">Ask the HTML5 Doctor</a></li>
<li id="menu-item-3968" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-3968"><a href="http://html5doctor.com/resources/">Resources</a></li>
</ul> <!-- end ul -->
<ul>
<li><form id="search-form" action="/search/" role="search" method="get">
<div>
<input type="text" name="q" value="" />
<input type="submit" id="search-button" value="Search" />
<!--<input id="search-input" class="text" type="text" tabindex="1" value="" name="search-input"/>
<input id="search-button" class="button" type="submit" tabindex="2" value="Search"/>-->
</div>
</form></li>
</ul>
<!-- end ul -->
</nav>
<!-- end nav -->
</div>
<!-- end .inner -->
</header>
<!-- end header -->
<div id="content" class="group" role="main">
<article id="glossary-list" class="post group glossary-list">
<div class="main">
<header>
<h1>HTML5 Element Index</h1>
<p class="tweet"><a href="http://twitter.com/share" class="twitter-share-button" data-count="horizontal" data-via="html5doctor">Tweet</a><script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script></p>
</header>
<!-- end header -->
<div class="entry">
<p>This is a quick reference of elements that are new or have been redefined in HTML5. For each element there is a short description, a link to the specification, and a code example. “Our prognosis” links to the HTML5 Doctor article on the element. There are more articles in the <a href="http://html5doctor.com/article-archive/" title="Article Archive | HTML5 Doctor">Article Archive</a>.</p>
</div>
<!-- end .entry -->
</div>
<!-- end .main -->
<aside class="gloss-ad">
<h3>Sponsor</h3>
<div id="bsap_1262253" class="bsarocks bsap_ab161e2bf71edb940eeca26a4739f522"></div>
</aside>
<!-- end .secondary -->
<nav>
<h2 class="a11y">Element navigation</h2>
<ol class="nav">
<li><a href="#a">A</a></li>
<li><a href="#b">B</a></li>
<li><a href="#c">C</a></li>
<li><a href="#d">D</a></li>
<li><a href="#e">E</a></li>
<li><a href="#f">F</a></li>
<li>G</li>
<li><a href="#h">H</a></li>
<li><a href="#i">I</a></li>
<li>J</li>
<li><a href="#k">K</a></li>
<li><a href="#l">L</a></li>
<li><a href="#m">M</a></li>
<li><a href="#n">N</a></li>
<li><a href="#o">O</a></li>
<li><a href="#p">P</a></li>
<li><a href="#q">Q</a></li>
<li><a href="#r">R</a></li>
<li><a href="#s">S</a></li>
<li><a href="#t">T</a></li>
<li><a href="#u">U</a></li>
<li><a href="#v">V</a></li>
<li><a href="#w">W</a></li>
<li>X</li>
<li>Y</li>
<li>Z</li>
</ol>
</nav>
<!-- end #glossary-list -->
<section>
<h2 id="a">A</h2>
<dl>
<dt>a<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>If the a element has an <code>href</code> attribute, then it represents a <code>hyperlink</code> (a <code>hypertext</code> anchor). If the a element has no <code>href</code> attribute, then the element represents a placeholder for where a link might otherwise have been placed, if it had been relevant.</p>
<p>The <code>target</code>, <code>rel</code>, <code>media</code>, <code>hreflang</code>, and <code>type</code> attributes must be omitted if the <code>href</code> attribute is not present.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-a-element" title="W3.org link to a element">http://dev.w3.org/html5/spec/Overview.html#the-a-element</a>
<a class="code" href="#a-element" title="A Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="abbr">abbr<span><a href="http://html5doctor.com/the-abbr-element/">our prognosis</a></span></dt>
<dd>
<p>Represents an abbreviation or acronym. The optional <code>title</code> attribute may be used to provide an expansion of the abbreviation. If specified, the title attribute must contain an expansion of the abbreviation and nothing else.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-abbr-element" title="W3.org link to abbr element">http://dev.w3.org/html5/spec/Overview.html#the-abbr-element</a>
<a class="code" href="#abbr-element" title="Abbr Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="address">address<span><a href="http://html5doctor.com/the-address-element/">our prognosis</a></span></dt>
<dd>
<p>Represents the contact information for its enclosing section. If it is a child of the <code>body</code> element, then it applies to the document as a whole.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-address-element" title="W3.org link to address element">http://dev.w3.org/html5/spec/Overview.html#the-address-element</a>
<a class="code" href="#address-element" title="Address Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="area">area<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>area</code> element represents either a <code>hyperlink</code> with some text and a corresponding area on an image map, or a dead area on an image map.</p>
<p>If the area element has no <code>href</code> attribute, then the area represented by the element cannot be selected, and the <code>alt</code> attribute must be omitted.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-area-element" title="W3.org link to area element">http://dev.w3.org/html5/spec/Overview.html#the-area-element</a>
<a class="code" href="#area-element" title="Area Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="article">article<span><a href="http://html5doctor.com/the-article-element/">our prognosis</a></span></dt>
<dd>
<p>Represents a section of a page that consists of a composition that forms an independent part of a document, page, or site. This could be a forum post, a magazine or newspaper article, a Web log entry, a user-submitted comment, or any other independent item of content.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-article-element" title="W3.org link to article element">http://dev.w3.org/html5/spec/Overview.html#the-article-element</a>
<a class="code" href="#article-element" title="Article Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="aside">aside<span><a href="http://html5doctor.com/aside-revisited/">our prognosis</a></span></dt>
<dd>
<p>Represents a section of a page consisting of content that is tangentially related to the content around the <code>aside</code> element, and which could be considered separate from that content. Such sections are often represented as sidebars in printed typography.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-aside-element" title="W3.org link to aside element">http://dev.w3.org/html5/spec/Overview.html#the-aside-element</a>
<a class="code" href="#aside-element" title="Aside Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="audio">audio<span><a href="http://html5doctor.com/native-audio-in-the-browser/">our prognosis</a></span></dt>
<dd>
<p>Represents a sound or audio stream.</p>
<p>Content may be nested inside the <code>audio</code> element. User agents should not show this content to the user. Authors should use this content to force older browsers to use a legacy audio plugin or to inform the user of how to access the audio content.</p>
<p><strong>Supported audio codecs:</strong></p>
<ul>
<li>Chrome 3+ supports <code>.ogg</code> and <code>.wav</code></li>
<li>Firefox 3.5+ supports <code>.ogg</code> and <code>.wav</code></li>
<li>Opera 10.5+ supports <code>.ogg</code> and <code>.wav</code></li>
<li>Safari 4+ supports <code>.mp3</code> and <code>.wav</code></li>
</ul>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#audio" title="W3.org link to audio element">http://dev.w3.org/html5/spec/Overview.html#audio</a>
<a class="code" href="#audio-element" title="Audio Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
</section>
<!-- end section -->
<section>
<h2 id="b">B</h2>
<dl>
<dt>b<span><a href="http://html5doctor.com/i-b-em-strong-element/">our prognosis</a></span></dt>
<dd>
<p>Represents a span of text to be stylistically offset from the normal prose without conveying any extra importance. Examples are key words in a document abstract, product names in a review, or other spans of text whose typical typographic presentation is bold.</p>
<p>The <code>b</code> element should be used as a last resort when no other element is more appropriate. In particular, headings should use the <code>h1</code> to <code>h6</code> elements, stress emphasis should use the em element, importance should be denoted with the strong element, and text marked or highlighted should use the mark element.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-b-element" title="W3.org link to b element">http://dev.w3.org/html5/spec/Overview.html#the-b-element</a>
<a class="code" href="#b-element" title="B Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="base">base<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>base</code> element allows authors to specify the document base URL for the purposes of resolving relative URLs, and the name of the default browsing context for the purposes of following hyperlinks. The element does not represent any content beyond this information.</p>
<p>There must be no more than one <code>base</code> element per document. A <code>base</code> element must have either an <code>href</code> attribute, a <code>target</code> attribute, or both.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-base-element" title="W3.org link to base element">http://dev.w3.org/html5/spec/Overview.html#the-base-element</a>
<a class="code" href="#base-element" title="Base Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="bdi">bdi<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>bdi</code> element represents a span of text that is to be isolated from its surroundings for the purposes of bidirectional text formatting.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/text-level-semantics.html#the-bdi-element" title="W3.org link to bdi element">http://dev.w3.org/html5/spec/text-level-semantics.html#the-bdi-element</a>
<a class="code" href="#bdi-element" title="BDI Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="bdo">bdo<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>bdo</code> element represents explicit text directionality formatting control for its children. It allows authors to override the Unicode bidirectional algorithm by explicitly specifying a direction override.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/text-level-semantics.html#the-bdo-element" title="W3.org link to bdo element">http://dev.w3.org/html5/spec/text-level-semantics.html#the-bdo-element</a>
<a class="code" href="#bdo-element" title="BDO Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="blockquote">blockquote<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>blockquote</code> element represents a section that is quoted from another source.</p>
<p>Content inside a <code>blockquote</code> must be quoted from another source, whose address, if it has one, may be cited in the cite attribute.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-blockquote-element" title="W3.org link to blockquote element">http://dev.w3.org/html5/spec/Overview.html#the-blockquote-element</a>
<a class="code" href="#blockquote-element" title="Blockquote Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="body">body<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>body</code> element represents the main content of the document.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-body-element-0" title="W3.org link to body element">http://dev.w3.org/html5/spec/Overview.html#the-body-element-0</a>
<a class="code" href="#body-element" title="Body Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="br">br<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>br</code> element represents a line break. <code>br</code> elements must be used only for line breaks that are actually part of the content, as in poems or addresses. <code>br</code> elements must not be used for separating thematic groups in a paragraph.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-br-element" title="W3.org link to br element">http://dev.w3.org/html5/spec/Overview.html#the-br-element</a>
<a class="code" href="#br-element" title="Br Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="button">button<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>button</code> element represents a button. If the element is not disabled, then the user agent should allow the user to activate the button.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-button-element" title="W3.org link to button element">http://dev.w3.org/html5/spec/Overview.html#the-button-element</a>
<a class="code" href="#button-element" title="Button Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
</section>
<!-- end section -->
<section>
<h2 id="c">C</h2>
<dl>
<dt id="canvas">canvas<span><a href="http://html5doctor.com/an-introduction-to-the-canvas-2d-api/">our prognosis</a></span></dt>
<dd>
<p>Represents a resolution-dependent bitmap canvas, which can be used for rendering graphs, game graphics, or other visual images on the fly.</p>
<p>Authors should not use the <code>canvas</code> element in a document when a more suitable element is available. For example, it is inappropriate to use a <code>canvas</code> element to render a page heading. If the desired presentation of the heading is graphically intense, it should be marked up using appropriate elements (typically <code>h1</code>) and then styled using <code>CSS</code> and supporting technologies such as <code>XBL</code>.</p>
<p>When authors use the <code>canvas</code> element, they must also provide content that, when presented to the user, conveys essentially the same function or purpose as the bitmap canvas. This content should be nested within the canvas element as a fallback.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-canvas-element" title="W3.org link to canvas element">http://dev.w3.org/html5/spec/Overview.html#the-canvas-element</a>
<a class="code" href="#canvas-element" title="Canvas Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="caption">caption<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>caption</code> element represents the title of the <code>table</code> that is its parent, if it has a parent and that is a table element.</p><p>When a <code>table</code> element is the only content in a <code>figure</code> element other than the <code>figcaption</code>, the <code>caption</code> element should be omitted in favor of the <code>figcaption</code>.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-caption-element" title="W3.org link to caption element">http://dev.w3.org/html5/spec/Overview.html#the-caption-element</a>
<a class="code" href="#caption-element" title="Caption Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="cite">cite<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>cite</code> element represents the title of a work (e.g. a book, a paper, an essay, a poem, a score, a song, a script, a film, a TV show, a game, a sculpture, a painting, a theatre production, a play, an opera, a musical, an exhibition, a legal case report, etc). This can be a work that is being quoted or referenced in detail (i.e. a citation), or it can just be a work that is mentioned in passing.</p>
<p>A person's name is not the title of a work — even if people call that person a piece of work — and the element must therefore not be used to mark up people's names. (In some cases, the b element might be appropriate for names; e.g. in a gossip article where the names of famous people are keywords rendered with a different style to draw attention to them. In other cases, if an element is really needed, the span element can be used.)</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-cite-element" title="W3.org link to cite element">http://dev.w3.org/html5/spec/Overview.html#the-cite-element</a>
<a class="code" href="#cite-element" title="Cite Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="code">code<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>code</code> element represents a fragment of computer code. This could be an <code>XML</code> element name, a filename, a computer program, or any other string that a computer would recognize.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-code-element" title="W3.org link to code element">http://dev.w3.org/html5/spec/Overview.html#the-code-element</a>
<a class="code" href="#code-element" title="Code Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="col">col<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>If a <code>col</code> element has a parent and that is a <code>colgroup</code> element that itself has a parent that is a <code>table</code> element, then the <code>col</code> element represents one or more columns in the column group represented by that <code>colgroup</code>.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-col-element" title="W3.org link to col element">http://dev.w3.org/html5/spec/Overview.html#the-col-element</a>
<a class="code" href="#col-element" title="Col Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="colgroup">colgroup<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>colgroup</code> element represents a group of one or more columns in the table that is its parent, if it has a parent and that is a <code>table</code> element.</p>
<p>If the <code>colgroup</code> element contains no col elements, then the element may have a <code>span</code> content attribute specified, whose value must be a valid non-negative integer greater than zero.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-colgroup-element" title="W3.org link to colgroup element">http://dev.w3.org/html5/spec/Overview.html#the-colgroup-element</a>
<a class="code" href="#colgroup-element" title="Colgroup Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="command">command<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>command</code> element represents a command that the user can invoke. A command can be part of a context menu or toolbar, using the <code>menu</code> element, or can be put anywhere else in the page, to define a keyboard shortcut.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-command" title="W3.org link to command element">http://dev.w3.org/html5/spec/Overview.html#the-command</a>
<a class="code" href="#command-element" title="Command Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
</section>
<!-- end section -->
<section>
<h2 id="d">D</h2>
<dl>
<dt id="datalist">datalist<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>datalist</code> element represents a set of option elements that represent predefined options for other controls. The contents of the element represents fallback content for legacy user agents, intermixed with <code>option</code> elements that represent the predefined options. In the rendering, the <code>datalist</code> element represents nothing and it, along with its children, should be hidden.</p>
<p>The <code>datalist</code> element is hooked up to an <code>input</code> element using the list attribute on the <code>input</code> element.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-datalist-element" title="W3.org link to datalist element">http://dev.w3.org/html5/spec/Overview.html#the-datalist-element</a>
<a class="code" href="#datalist-element" title="Datalist Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end datalist -->
<dl>
<dt id="dd">dd<span><a href="http://html5doctor.com/the-dl-element/">our prognosis</a></span></dt>
<dd>
<p>The <code>dd</code> element represents the description, definition, or value, part of a term-description group in a description list (<code>dl</code> element).</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-dd-element" title="W3.org link to dd element">http://dev.w3.org/html5/spec/Overview.html#the-dd-element</a>
<a class="code" href="#dd-element" title="DD Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="del">del<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>del</code> element represents a removal from the document. Thedel elements should not cross implied paragraph boundaries</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-del-element" title="W3.org link to del element">http://dev.w3.org/html5/spec/Overview.html#the-del-element</a>
<a class="code" href="#del-element" title="Del Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="details">details<span><a href="http://html5doctor.com/the-details-and-summary-elements/">our prognosis</a></span></dt>
<dd>
<p>The <code>details</code> element represents a disclosure widget from which the user can obtain additional information or controls. However, the <code>details</code> element is not appropriate for footnotes.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-details-element" title="W3.org link to details element">http://dev.w3.org/html5/spec/Overview.html#the-details-element</a>
<a class="code" href="#details-element" title="Details Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="dfn">dfn<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>dfn</code> element represents the defining instance of a term. The paragraph, description list group, or section that is the nearest ancestor of the <code>dfn</code> element must also contain the definition(s) for the term given by the <code>dfn</code> element.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-dfn-element" title="W3.org link to dfn element">http://dev.w3.org/html5/spec/Overview.html#the-dfn-element</a>
<a class="code" href="#dfn-element" title="DFN Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="div">div<span><a href="http://html5doctor.com/you-can-still-use-div/">our prognosis</a></span></dt>
<dd>
<p>The <code>div</code> element has no special meaning at all. It represents its children. It can be used with the <code>class</code>, <code>lang</code>, and <code>title</code> attributes to mark up semantics common to a group of consecutive elements.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-div-element" title="W3.org link to div element">http://dev.w3.org/html5/spec/Overview.html#the-div-element</a>
<a class="code" href="#div-element" title="Div Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="dl">dl<span><a href="http://html5doctor.com/the-dl-element/">our prognosis</a></span></dt>
<dd>
<p>Represents a description list consisting of zero or more name-value groups. Each group must consist of one or more names (<code>dt</code> elements) each followed by one or more values (<code>dd</code> elements).</p>
<p>Name-value groups may be terms and definitions, <code>metadata</code> topics and values, or any other groups of name-value data. The values within a group are alternatives; multiple paragraphs forming part of the same value must all be given within the same <code>dd</code> element.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-dl-element" title="W3.org link to dl element">http://dev.w3.org/html5/spec/Overview.html#the-dl-element</a>
<a class="code" href="#dl-element" title="DL Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="dt">dt<span><a href="http://html5doctor.com/the-dl-element/">our prognosis</a></span></dt>
<dd>
<p>The <code>dt</code> element represents the term, or name, part of a term-description group in a description list (<code>dl</code> element).</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-dt-element" title="W3.org link to dt element">http://dev.w3.org/html5/spec/Overview.html#the-dt-element</a>
<a class="code" href="#dt-element" title="DT Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="doctype">doctype<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>A <code>DOCTYPE</code> is a required preamble and must consist of the following characters, in this order:</p>
<ol>
<li>A string that is an ASCII case-insensitive match for the string "<!DOCTYPE".</li>
<li>One or more space characters.</li>
<li>A string that is an ASCII case-insensitive match for the string "<code>html</code>".</li>
<li>Optionally, a <code>DOCTYPE</code> legacy string or an obsolete permitted <code>DOCTYPE</code> string (defined below).</li>
<li>Zero or more space characters.</li>
<li>A U+003E GREATER-THAN SIGN character (>).</li>
</ol>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-doctype" title="W3.org link to doctype">http://dev.w3.org/html5/spec/Overview.html#the-doctype</a>
<a class="code" href="#doctype-element" title="Doctype Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
</section>
<!-- end section -->
<section>
<h2 id="e">E</h2>
<dl>
<dt id="em">em<span><a href="http://html5doctor.com/i-b-em-strong-element/">our prognosis</a></span></dt>
<dd>
<p>Represents stress emphasis of its contents. The level of emphasis that a particular piece of content has is given by its number of ancestor <code>em</code> elements. The 'stress' being referred to is linguistic. If spoken, this stress would be emphasised pronunciation on a word that can change the nuance of a sentence.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-em-element" title="W3.org link to em element">http://dev.w3.org/html5/spec/Overview.html#the-em-element</a>
<a class="code" href="#em-element" title="Em Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="embed">embed<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>Represents an integration point for an external(typically non-<code>HTML</code>) application or interactive content.</p>
<p>The optional <code>src</code> attribute specifies the URL of the resource being embedded.</p>
<p>The optional type attribute specifies the <code>MIME</code> type of the plugin to instantiate. The value must be a valid <code>MIME</code> type, optionally with parameters. If both the type attribute and the src attribute are present, then the type attribute must specify the same MIME type as the explicit Content-Type metadata of the resource given by the src attribute.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-embed-element" title="W3.org link to embed element">http://dev.w3.org/html5/spec/Overview.html#the-embed-element</a>
<a class="code" href="#embed-element" title="Embed Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
</section>
<!-- end section -->
<section>
<h2 id="f">F</h2>
<dl>
<dt id="fieldset">fieldset<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>fieldset</code> element is expected to establish a new block formatting context.</p>
<p>If the <code>fieldset</code> element has a child that matches the conditions in the list below, then the first such child is the fieldset element's rendered legend:</p>
<ul>
<li>The child is a <code>legend</code> element.</li>
<li>The child is not out-of-flow (e.g. not absolutely positioned or floated).</li>
<li>The child is generating a box (e.g. it is not '<code>display:none</code>').</li>
</ul>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-fieldset-element" title="W3.org link to fieldset element">http://dev.w3.org/html5/spec/Overview.html#the-fieldset-element</a>
<a class="code" href="#fieldset-element" title="Fieldset Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="figcaption">figcaption<span><a href="http://html5doctor.com/the-figure-figcaption-elements/">our prognosis</a></span></dt>
<dd>
<p>The <code>figcaption</code> element represents a <code>caption</code> or <code>legend</code> for the rest of the contents of the <code>figcaption</code> element's parent <code>figure</code> element, if any.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-figcaption-element" title="W3.org link to figcaption element">http://dev.w3.org/html5/spec/Overview.html#the-figcaption-element</a>
<a class="code" href="#figcaption-element" title="Figcaption Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="figure">figure<span><a href="http://html5doctor.com/the-figure-figcaption-elements/">our prognosis</a></span></dt>
<dd>
<p>The <code>figure</code> element represents some flow content, optionally with a <code>caption</code>, that is self-contained and is typically referenced as a single unit from the main flow of the document.</p>
<p>The figure element can be used to annotate illustrations, diagrams, photos, code listings, etc., that are referenced in the main content of the document, but that could, without affecting the flow of the document, be moved away from that primary content — e.g., to the side of the page, to dedicated pages, or to an appendix.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-figure-element" title="W3.org link to figure element">http://dev.w3.org/html5/spec/Overview.html#the-figure-element</a>
<a class="code" href="#figure-element" title="Figure Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="footer">footer<span><a href="http://html5doctor.com/the-footer-element-update/">our prognosis</a></span></dt>
<dd>
<p>Represents the "<code>footer</code>" of a document or section of a document. The <code>footer</code> element typically contains <code>metadata</code> about its enclosing section, such as who wrote it, links to related documents, copyright data, etc. Contact information for the section given in a footer should be marked up using the <code>address</code> element.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-footer-element" title="W3.org link to footer element">http://dev.w3.org/html5/spec/Overview.html#the-footer-element</a>
<a class="code" href="#footer-element" title="Footer Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="form2">form<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>form</code> element represents a collection of form-associated elements, some of which can represent editable values that can be submitted to a server for processing.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-form-element" title="W3.org link to form element">http://dev.w3.org/html5/spec/Overview.html#the-form-element</a>
<a class="code" href="#form-element" title="Form Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
</section>
<!-- end section -->
<section>
<h2 id="h">H</h2>
<dl>
<dt id="h1">h1-h6<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>Represent headings and subheadings. These elements rank in importance according to the number in their name. The <code>h1</code> element is said to have the highest rank, the <code>h6</code> element has the lowest rank, and two elements with the same name have equal rank.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-h1-h2-h3-h4-h5-and-h6-elements" title="W3.org link to heading elements">http://dev.w3.org/html5/spec/Overview.html#the-h1-h2-h3-h4-h5-and-h6-elements</a>
<a class="code" href="#hn-element" title="H(n) Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="head">head<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>head</code> element represents a collection of <code>metadata</code> for the Document.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-head-element-0" title="W3.org link to head element">http://dev.w3.org/html5/spec/Overview.html#the-head-element-0</a>
<a class="code" href="#head-element" title="Head Element">code snippet</a>
</footer>
</dd>
</dl>
<!-- end dl -->
<dl>
<dt id="header">header<span><a href="http://html5doctor.com/the-header-element/">our prognosis</a></span></dt>
<dd>
<p>Represents the "<code>header</code>" of a document or section of a document. The header element is typically used to group a set of <code>h1</code>–<code>h6</code> elements to mark up a page's title with its subtitle or tagline. <code>header</code> elements may, however, contain more than just the section's headings and subheadings — e.g., version history information or publication date.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-header-element" title="W3.org link to header element">http://dev.w3.org/html5/spec/Overview.html#the-header-element</a>
<a class="code" href="#header-element" title="Header Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="hgroup">hgroup<span><a href="http://html5doctor.com/the-hgroup-element/">our prognosis</a></span></dt>
<dd>
<p>Represents the heading of a section. The <code>hgroup</code> element is used to group a set of <code>h1</code>–<code>h6</code> elements when the heading has multiple levels, such as subheadings, alternative titles, or taglines.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-hgroup-element" title="W3.org link to hgroup element">http://dev.w3.org/html5/spec/Overview.html#the-hgroup-element</a>
<a class="code" href="#hgroup-element" title="Hgroup Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="hr">hr<span><a href="http://html5doctor.com/small-hr-element/">our prognosis</a></span></dt>
<dd>
<p>Represents a paragraph-level thematic break. The "paragraph-level" bit means between blocks of text, so it can't be used to separate sections of a site. Instead, <code>hr</code> now separates different topics within a section of prose, or between scenes in a novel.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-hr-element-0" title="W3.org link to hr element">http://dev.w3.org/html5/spec/Overview.html#the-hr-element-0</a>
<a class="code" href="#hr-element" title="HR Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="html">html<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>html</code> element represents the root of an <code>HTML</code> document.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-html-element-0" title="W3.org link to html element">http://dev.w3.org/html5/spec/Overview.html#the-html-element-0</a>
<a class="code" href="#html-element" title="HTML Element">code snippet</a>
</footer>
</dd>
</dl>
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</section>
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<section>
<h2 id="i">I</h2>
<dl>
<dt>i<span><a href="http://html5doctor.com/i-b-em-strong-element/">our prognosis</a></span></dt>
<dd>
<p>Represents a span of text in an alternate voice or mood, or otherwise offset from the normal prose, such as a taxonomic designation, a technical term, an idiomatic phrase from another language, a thought, a ship name, or some other prose whose typical typographic presentation is italicized.</p>
<p>Only use i when nothing more suitable is available — e.g., <code>em</code> for text with stress emphasis, <code>strong</code> for text with semantic importance, <code>cite</code> for titles in a citation or bibliography, <code>dfn</code> for defining a word, and <code>var</code> for mathematical variables.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-i-element" title="W3.org link to i element">http://dev.w3.org/html5/spec/Overview.html#the-i-element</a>
<a class="code" href="#i-element" title="I Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="iframe">iframe<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>iframe</code> element represents a nested browsing context.</p>
<p>For <code>iframe</code> elements in <code>HTML</code> documents, the attribute, if present, must have a value using the <code>HTML</code> syntax that consists of the following syntactic components, in the given order:</p>
<ul>
<li>Any number of comments and space characters.</li>
<li>Optionally, a <code>DOCTYPE</code>.</li>
<li>Any number of comments and space characters.</li>
<li>The root element, in the form of an <code>html</code> element.</li>
<li>Any number of comments and space characters.</li>
</ul>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-iframe-element" title="W3.org link to iframe element">http://dev.w3.org/html5/spec/Overview.html#the-iframe-element</a>
<a class="code" href="#iframe-element" title="Iframe Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="img">img<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>An <code>img</code> element represents an image. The image given by the <code>src</code> attribute is the embedded content, and the value of the <code>alt</code> attribute is the <code>img</code> element's fallback content.</p>
<p>The <code>src</code> attribute must be present, and must contain a valid non-empty URL potentially surrounded by spaces referencing a non-interactive, optionally animated, image resource that is neither paged nor scripted.</p>
<p>The <code>img</code> element must not be used as a layout tool. In particular, <code>img</code> elements should not be used to display transparent images, as they rarely convey meaning and rarely add anything useful to the document.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-img-element" title="W3.org link to img element">http://dev.w3.org/html5/spec/Overview.html#the-img-element</a>
<a class="code" href="#img-element" title="IMG Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="input">input<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>input</code> element represents a typed data field, usually with a form control to allow the user to edit the data.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-input-element" title="W3.org link to input element">http://dev.w3.org/html5/spec/Overview.html#the-input-element</a>
<a class="code" href="#input-element" title="Input Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="ins">ins<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>ins</code> element represents an addition to the document. The ins elements should not cross implied paragraph boundaries.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-ins-element" title="W3.org link to ins element">http://dev.w3.org/html5/spec/Overview.html#the-ins-element</a>
<a class="code" href="#ins-element" title="Ins Element">code snippet</a>
</footer>
</dd>
</dl>
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</section>
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<section>
<h2 id="k">K</h2>
<dl>
<dt id="kbd">kbd<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>kbd</code> element represents user input (typically keyboard input, although it may also be used to represent other input, such as voice commands).</p>
<p>When the <code>kbd</code> element is nested inside a samp element, it represents the input as it was echoed by the system. When the <code>kbd</code> element contains a <code>samp</code> element, it represents input based on system output, for example invoking a menu item.</p>
<p>When the <code>kbd</code> element is nested inside another <code>kbd</code> element, it represents an actual key or other single unit of input as appropriate for the input mechanism.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-kbd-element" title="W3.org link to kbd element">http://dev.w3.org/html5/spec/Overview.html#the-kbd-element</a>
<a class="code" href="#kbd-element" title="KBD Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="keygen">keygen<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>keygen</code> element represents a key pair generator control. When the control's form is submitted, the private key is stored in the local keystore, and the public key is packaged and sent to the server.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-keygen-element" title="W3.org link to keygen element">http://dev.w3.org/html5/spec/Overview.html#the-keygen-element</a>
<a class="code" href="#keygen-element" title="Keygen Element">code snippet</a>
</footer>
</dd>
</dl>
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</section>
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<section>
<h2 id="l">L</h2>
<dl>
<dt id="label">label<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>label</code> represents a caption in a user interface. The caption can be associated with a specific form control, known as the <code>label</code> element's labeled control, either using for attribute, or by putting the form control inside the <code>label</code> element itself.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-label-element" title="W3.org link to label element">http://dev.w3.org/html5/spec/Overview.html#the-label-element</a>
<a class="code" href="#label-element" title="Label Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="legend">legend<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>legend</code> element represents a caption for the rest of the contents of the <code>legend</code> element's parent fieldset element, if any.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-legend-element" title="W3.org link to legend element">http://dev.w3.org/html5/spec/Overview.html#the-legend-element</a>
<a class="code" href="#legend-element" title="Legend Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="li">li<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>li</code> element represents a list item. If its parent element is an <code>ol</code>, <code>ul</code>, or <code>menu</code> element, then the element is an item of the parent element's list, as defined for those elements. Otherwise, the list item has no defined list-related relationship to any other <code>li</code> element.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-li-element" title="W3.org link to li element">http://dev.w3.org/html5/spec/Overview.html#the-li-element</a>
<a class="code" href="#li-element" title="LI Element">code snippet</a>
</footer>
</dd>
</dl>
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<dl>
<dt id="link">link<!--span><a href="#">our prognosis</a></span--></dt>
<dd>
<p>The <code>link</code> element allows authors to link their document to other resources.</p>
<p>The destination of the link(s) is given by the <code>href</code> attribute, which must be present and must contain a valid non-empty URL potentially surrounded by spaces. If the <code>href</code> attribute is absent, then the element does not define a link.</p>
<p>A link element must have <code>rel</code> attribute.</p>
<footer>
<a class="link" href="http://dev.w3.org/html5/spec/Overview.html#the-link-element" title="W3.org link to link element">http://dev.w3.org/html5/spec/Overview.html#the-link-element</a>
<a class="code" href="#link-element" title="Link Element">code snippet</a>
</footer>
</dd>
</dl>
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</section>