From eb2d99747e63d5710bd713c184743699a4242dff Mon Sep 17 00:00:00 2001
From: Sebastien Besson <seb.besson@gmail.com>
Date: Mon, 31 Jan 2022 16:34:48 +0000
Subject: [PATCH 1/2] Add example of dataset with missing scale element

---
 0.4/examples/invalid/missing_scale.json | 30 +++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 0.4/examples/invalid/missing_scale.json

diff --git a/0.4/examples/invalid/missing_scale.json b/0.4/examples/invalid/missing_scale.json
new file mode 100644
index 00000000..ed863677
--- /dev/null
+++ b/0.4/examples/invalid/missing_scale.json
@@ -0,0 +1,30 @@
+{
+    "multiscales": [
+        {
+            "axes": [
+                {
+                    "name": "y",
+                    "type": "space",
+                    "units": "micrometer"
+                },
+                {
+                    "name": "x",
+                    "type": "space",
+                    "units": "micrometer"
+                }
+            ],
+            "datasets": [
+                {
+                    "path": "0",
+                    "coordinateTransformations": [
+                        {
+                            "translation": [1, 1],
+                            "type": "translation"
+                        }
+                    ]
+                }
+            ],
+            "version": "0.4"
+        }
+    ]
+}
\ No newline at end of file

From b993d8b0ac59d3dfa129d51e9cadf53941eee0c6 Mon Sep 17 00:00:00 2001
From: Sebastien Besson <seb.besson@gmail.com>
Date: Mon, 31 Jan 2022 16:35:07 +0000
Subject: [PATCH 2/2] Add containment requirement for scale element in
 coordinateTransformations

---
 0.4/schemas/image.schema | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/0.4/schemas/image.schema b/0.4/schemas/image.schema
index 4b728f14..4558d7f0 100644
--- a/0.4/schemas/image.schema
+++ b/0.4/schemas/image.schema
@@ -26,6 +26,24 @@
                 "coordinateTransformations": {
                   "type": "array",
                   "minItems": 1,
+                  "contains": {
+                    "type": "object",
+                    "properties": {
+                      "type": {
+                        "type": "string",
+                        "enum": [
+                          "scale"
+                        ]
+                      },
+                      "scale": {
+                        "type": "array",
+                        "minItems": 2,
+                        "items": {
+                          "type": "number"
+                        }
+                      }
+                    }
+                  },
                   "items": {
                     "oneOf": [
                       {