diff --git a/exercises/ocr-numbers/canonical-data.json b/exercises/ocr-numbers/canonical-data.json
index 4d422480aa..6059cba356 100644
--- a/exercises/ocr-numbers/canonical-data.json
+++ b/exercises/ocr-numbers/canonical-data.json
@@ -1,187 +1,208 @@
 {
-  "#": [
+  "exercise": "ocr-numbers",
+  "version": "1.0.0",
+  "comments": [
     "An expectation of  -1 indicates that a failure should be raised"
   ],
-  "convert": {
-    "description": "Converts lines of OCR Numbers to a string of integers",
-    "cases": [
-      {
-        "description": "Recognizes 0",
-        "input": [
-          " _ ",
-          "| |",
-          "|_|",
-          "   "
-        ],
-        "expected": "0"
-      },
-      {
-        "description": "Recognizes 1",
-        "input": [
-          "   ",
-          "  |",
-          "  |",
-          "   "
-        ],
-        "expected": "1"
-      },
-      {
-        "description": "Unreadable but correctly sized inputs return ?",
-        "input": [
-          "   ",
-          "  _",
-          "  |",
-          "   "
-        ],
-        "expected": "?"
-      },
-      {
-        "description": "Input with a number of lines that is not a multiple of four raises an error",
-        "input": [
-          " _ ",
-          "| |",
-          "   "
-        ],
-        "expected": -1
-      },
-      {
-        "description": "Input with a number of columns that is not a multiple of three raises an error",
-        "input": [
-          "    ",
-          "   |",
-          "   |",
-          "    "
-        ],
-        "expected": -1
-      },
-      {
-        "description": "Recognizes 110101100",
-        "input": [
-          "       _     _        _  _ ",
-          "  |  || |  || |  |  || || |",
-          "  |  ||_|  ||_|  |  ||_||_|",
-          "                           "
-        ],
-        "expected": "110101100"
-      },
-      {
-        "description": "Garbled numbers in a string are replaced with ?",
-        "input": [
-          "       _     _           _ ",
-          "  |  || |  || |     || || |",
-          "  |  | _|  ||_|  |  ||_||_|",
-          "                           "
-        ],
-        "expected": "11?10?1?0"
-      },
-      {
-        "description": "Recognizes 2",
-        "input": [
-          " _ ",
-          " _|",
-          "|_ ",
-          "   "
-      ],
-      "expected": "2"
-      },
-      {
-      "description": "Recognizes 3",
-      "input": [
-        " _ ",
-        " _|",
-        " _|",
-        "   "
-      ],
-      "expected": "3"
-      },
-      {
-      "description": "Recognizes 4",
-      "input": [
-        "   ",
-        "|_|",
-        "  |",
-        "   "
-      ],
-      "expected": "4"
-      },
-      {
-      "description": "Recognizes 5",
-      "input": [
-        " _ ",
-        "|_ ",
-        " _|",
-        "   "
-      ],
-      "expected": "5"
-      },
-      {
-      "description": "Recognizes 6",
-      "input": [
-        " _ ",
-        "|_ ",
-        "|_|",
-        "   "
-      ],
-      "expected": "6"
-      },
-      {
-      "description": "Recognizes 7",
-      "input": [
-        " _ ",
-        "  |",
-        "  |",
-        "   "
-      ],
-      "expected": "7"
-      },
-      {
-      "description": "Recognizes 8",
-      "input": [
-        " _ ",
-        "|_|",
-        "|_|",
-        "   "
-      ],
-      "expected": "8"
-      },
-      {
-      "description": "Recognizes 9",
-      "input": [
-        " _ ",
-        "|_|",
-        " _|",
-        "   "
-      ],
-      "expected": "9"
-      },
-      {
-      "description": "Recognizes string of decimal numbers",
-      "input": [
-        "    _  _     _  _  _  _  _  _ ",
-        "  | _| _||_||_ |_   ||_||_|| |",
-        "  ||_  _|  | _||_|  ||_| _||_|",
-        "                              "
-      ],
-      "expected": "1234567890"
-      },
-      {
-      "description": "Numbers separated by empty lines are recognized. Lines are joined by commas.",
-      "input": [
-        "    _  _ ",
-        "  | _| _|",
-        "  ||_  _|",
-        "         ",
-        "    _  _ ",
-        "|_||_ |_ ",
-        "  | _||_|",
-        "         ",
-        " _  _  _ ",
-        "  ||_||_|",
-        "  ||_| _|",
-        "         "
-      ],
-      "expected": "123,456,789"
-      }
-    ]
-  }
+  "cases": [
+    {
+      "description": "Converts lines of OCR Numbers to a string of integers",
+      "cases": [
+        {
+          "description": "Recognizes 0",
+          "property": "convert",
+          "input": [
+            " _ ",
+            "| |",
+            "|_|",
+            "   "
+          ],
+          "expected": "0"
+        },
+        {
+          "description": "Recognizes 1",
+          "property": "convert",
+          "input": [
+            "   ",
+            "  |",
+            "  |",
+            "   "
+          ],
+          "expected": "1"
+        },
+        {
+          "description": "Unreadable but correctly sized inputs return ?",
+          "property": "convert",
+          "input": [
+            "   ",
+            "  _",
+            "  |",
+            "   "
+          ],
+          "expected": "?"
+        },
+        {
+          "description": "Input with a number of lines that is not a multiple of four raises an error",
+          "property": "convert",
+          "input": [
+            " _ ",
+            "| |",
+            "   "
+          ],
+          "expected": -1
+        },
+        {
+          "description": "Input with a number of columns that is not a multiple of three raises an error",
+          "property": "convert",
+          "input": [
+            "    ",
+            "   |",
+            "   |",
+            "    "
+          ],
+          "expected": -1
+        },
+        {
+          "description": "Recognizes 110101100",
+          "property": "convert",
+          "input": [
+            "       _     _        _  _ ",
+            "  |  || |  || |  |  || || |",
+            "  |  ||_|  ||_|  |  ||_||_|",
+            "                           "
+          ],
+          "expected": "110101100"
+        },
+        {
+          "description": "Garbled numbers in a string are replaced with ?",
+          "property": "convert",
+          "input": [
+            "       _     _           _ ",
+            "  |  || |  || |     || || |",
+            "  |  | _|  ||_|  |  ||_||_|",
+            "                           "
+          ],
+          "expected": "11?10?1?0"
+        },
+        {
+          "description": "Recognizes 2",
+          "property": "convert",
+          "input": [
+            " _ ",
+            " _|",
+            "|_ ",
+            "   "
+          ],
+          "expected": "2"
+        },
+        {
+          "description": "Recognizes 3",
+          "property": "convert",
+          "input": [
+            " _ ",
+            " _|",
+            " _|",
+            "   "
+          ],
+          "expected": "3"
+        },
+        {
+          "description": "Recognizes 4",
+          "property": "convert",
+          "input": [
+            "   ",
+            "|_|",
+            "  |",
+            "   "
+          ],
+          "expected": "4"
+        },
+        {
+          "description": "Recognizes 5",
+          "property": "convert",
+          "input": [
+            " _ ",
+            "|_ ",
+            " _|",
+            "   "
+          ],
+          "expected": "5"
+        },
+        {
+          "description": "Recognizes 6",
+          "property": "convert",
+          "input": [
+            " _ ",
+            "|_ ",
+            "|_|",
+            "   "
+          ],
+          "expected": "6"
+        },
+        {
+          "description": "Recognizes 7",
+          "property": "convert",
+          "input": [
+            " _ ",
+            "  |",
+            "  |",
+            "   "
+          ],
+          "expected": "7"
+        },
+        {
+          "description": "Recognizes 8",
+          "property": "convert",
+          "input": [
+            " _ ",
+            "|_|",
+            "|_|",
+            "   "
+          ],
+          "expected": "8"
+        },
+        {
+          "description": "Recognizes 9",
+          "property": "convert",
+          "input": [
+            " _ ",
+            "|_|",
+            " _|",
+            "   "
+          ],
+          "expected": "9"
+        },
+        {
+          "description": "Recognizes string of decimal numbers",
+          "property": "convert",
+          "input": [
+            "    _  _     _  _  _  _  _  _ ",
+            "  | _| _||_||_ |_   ||_||_|| |",
+            "  ||_  _|  | _||_|  ||_| _||_|",
+            "                              "
+          ],
+          "expected": "1234567890"
+        },
+        {
+          "description": "Numbers separated by empty lines are recognized. Lines are joined by commas.",
+          "property": "convert",
+          "input": [
+            "    _  _ ",
+            "  | _| _|",
+            "  ||_  _|",
+            "         ",
+            "    _  _ ",
+            "|_||_ |_ ",
+            "  | _||_|",
+            "         ",
+            " _  _  _ ",
+            "  ||_||_|",
+            "  ||_| _|",
+            "         "
+          ],
+          "expected": "123,456,789"
+        }
+      ]
+    }
+  ]
 }