Make isogram exercise JSON Schema compliant

exercises/isogram/canonical-data.json

@@ -1,44 +1,65 @@
 {
+  "exercise": "isogram",
+  "comments": [
+    "An isogram is a word or phrase without a repeating letter."
+  ],
+  "version": "1.0.0",
   "cases": [
     {
-      "description": "empty string",
-      "input": "",
-      "expected": true
-    },
-    {
-      "description": "isogram with only lower case characters",
-      "input": "isogram",
-      "expected": true
-    },
-    {
-      "description": "word with one duplicated character",
-      "input": "eleven",
-      "expected": false
-    },
-    {
-      "description": "longest reported english isogram",
-      "input": "subdermatoglyphic",
-      "expected": true
-    },
-    {
-      "description": "word with duplicated character in mixed case",
-      "input": "Alphabet",
-      "expected": false
-    },
-    {
-      "description": "hypothetical isogrammic word with hyphen",
-      "input": "thumbscrew-japingly",
-      "expected": true
-    },
-    {
-      "description": "isogram with duplicated non letter character",
-      "input": "Hjelmqvist-Gryb-Zock-Pfund-Wax",
-      "expected": true
-    },
-    {
-      "description": "made-up name that is an isogram",
-      "input": "Emily Jung Schwartzkopf",
-      "expected": true
+      "description": "Check if the given string is an isogram",
+      "comments": [
+        "Output should be a boolean denoting if the string is a isogram or not."
+      ],
+      "cases": [
+        {
+          "description": "empty string",
+          "property": "isIsogram",
+          "input": "",
+          "expected": true
+        },
+        {
+          "description": "isogram with only lower case characters",
+          "property": "isIsogram",
+          "input": "isogram",
+          "expected": true
+        },
+        {
+          "description": "word with one duplicated character",
+          "property": "isIsogram",
+          "input": "eleven",
+          "expected": false
+        },
+        {
+          "description": "longest reported english isogram",
+          "property": "isIsogram",
+          "input": "subdermatoglyphic",
+          "expected": true
+        },
+        {
+          "description": "word with duplicated character in mixed case",
+          "property": "isIsogram",
+          "input": "Alphabet",
+          "expected": false
+        },
+        {
+          "description": "hypothetical isogrammic word with hyphen",
+          "property": "isIsogram",
+          "input": "thumbscrew-japingly",
+          "expected": true
+        },
+        {
+          "description": "isogram with duplicated non letter character",
+          "property": "isIsogram",
+          "input": "Hjelmqvist-Gryb-Zock-Pfund-Wax",
+          "expected": true
+        },
+        {
+          "description": "made-up name that is an isogram",
+          "property": "isIsogram",
+          "input": "Emily Jung Schwartzkopf",
+          "expected": true
+        }
+      ]
     }
   ]
 }