diff --git a/exercises/hamming/canonical-data.json b/exercises/hamming/canonical-data.json
index c50c931245..3470637b05 100644
--- a/exercises/hamming/canonical-data.json
+++ b/exercises/hamming/canonical-data.json
@@ -1,106 +1,123 @@
 {
-   "#": [
-     "Language implementations vary on the issue of unequal length strands.",
-     "A language may elect to simplify this task by only presenting equal",
-     "length test cases.  For languages handling unequal length strands as",
-     "error condition, unequal length test cases are included here and are",
-     "indicated with an expected value of -1.  Note however that -1 is",
-     "simply an indication here in the JSON.  Actually returning -1 from",
-     "a hamming distance function may or may not be idiomatic in a language.",
-     "Language idioms of errors or exceptions should be followed.",
-     "Alternative interpretations such as ignoring excess length at the end",
-     "are not represented here."
-   ],
-   "cases": [
-      {
-         "description": "identical strands",
-         "strand1": "A",
-         "strand2": "A",
-         "expected": 0
-      },
-      {
-         "description": "long identical strands",
-         "strand1": "GGACTGA",
-         "strand2": "GGACTGA",
-         "expected": 0
-      },
-      {
-         "description": "complete distance in single nucleotide strands",
-         "strand1": "A",
-         "strand2": "G",
-         "expected": 1
-      },
-      {
-         "description": "complete distance in small strands",
-         "strand1": "AG",
-         "strand2": "CT",
-         "expected": 2
-      },
-      {
-         "description": "small distance in small strands",
-         "strand1": "AT",
-         "strand2": "CT",
-         "expected": 1
-      },
-      {
-         "description": "small distance",
-         "strand1": "GGACG",
-         "strand2": "GGTCG",
-         "expected": 1
-      },
-      {
-         "description": "small distance in long strands",
-         "strand1": "ACCAGGG",
-         "strand2": "ACTATGG",
-         "expected": 2
-      },
-      {
-         "description": "non-unique character in first strand",
-         "strand1": "AGA",
-         "strand2": "AGG",
-         "expected": 1
-      },
-      {
-         "description": "non-unique character in second strand",
-         "strand1": "AGG",
-         "strand2": "AGA",
-         "expected": 1
-      },
-      {
-         "description": "same nucleotides in different positions",
-         "strand1": "TAG",
-         "strand2": "GAT",
-         "expected": 2
-      },
-      {
-         "description": "large distance",
-         "strand1": "GATACA",
-         "strand2": "GCATAA",
-         "expected": 4
-      },
-      {
-         "description": "large distance in off-by-one strand",
-         "strand1":  "GGACGGATTCTG",
-         "strand2": "AGGACGGATTCT",
-         "expected": 9
-      },
-      {
-         "description": "empty strands",
-         "strand1": "",
-         "strand2": "",
-         "expected": 0
-      },
-      {
-         "description": "disallow first strand longer",
-         "strand1": "AATG",
-         "strand2": "AAA",
-         "expected": -1
-      },
-      {
-         "description": "disallow second strand longer",
-         "strand1": "ATA",
-         "strand2": "AGTG",
-         "expected": -1
-      }
-   ]
+"exercise": "hamming",
+"version": "1.0.0",
+  "comments": [
+    "Language implementations vary on the issue of unequal length strands.",
+    "A language may elect to simplify this task by only presenting equal",
+    "length test cases.  For languages handling unequal length strands as",
+    "error condition, unequal length test cases are included here and are",
+    "indicated with an expected value of -1.  Note however that -1 is",
+    "simply an indication here in the JSON.  Actually returning -1 from",
+    "a hamming distance function may or may not be idiomatic in a language.",
+    "Language idioms of errors or exceptions should be followed.",
+    "Alternative interpretations such as ignoring excess length at the end",
+    "are not represented here."
+  ],
+  "cases": [
+    {
+      "description": "identical strands",
+      "property": "distance",
+      "strand1": "A",
+      "strand2": "A",
+      "expected": 0
+    },
+    {
+      "description": "long identical strands",
+      "property": "distance",
+      "strand1": "GGACTGA",
+      "strand2": "GGACTGA",
+      "expected": 0
+    },
+    {
+      "description": "complete distance in single nucleotide strands",
+      "property": "distance",
+      "strand1": "A",
+      "strand2": "G",
+      "expected": 1
+    },
+    {
+      "description": "complete distance in small strands",
+      "property": "distance",
+      "strand1": "AG",
+      "strand2": "CT",
+      "expected": 2
+    },
+    {
+      "description": "small distance in small strands",
+      "property": "distance",
+      "strand1": "AT",
+      "strand2": "CT",
+      "expected": 1
+    },
+    {
+      "description": "small distance",
+      "property": "distance",
+      "strand1": "GGACG",
+      "strand2": "GGTCG",
+      "expected": 1
+    },
+    {
+      "description": "small distance in long strands",
+      "property": "distance",
+      "strand1": "ACCAGGG",
+      "strand2": "ACTATGG",
+      "expected": 2
+    },
+    {
+      "description": "non-unique character in first strand",
+      "property": "distance",
+      "strand1": "AGA",
+      "strand2": "AGG",
+      "expected": 1
+    },
+    {
+      "description": "non-unique character in second strand",
+      "property": "distance",
+      "strand1": "AGG",
+      "strand2": "AGA",
+      "expected": 1
+    },
+    {
+      "description": "same nucleotides in different positions",
+      "property": "distance",
+      "strand1": "TAG",
+      "strand2": "GAT",
+      "expected": 2
+    },
+    {
+      "description": "large distance",
+      "property": "distance",
+      "strand1": "GATACA",
+      "strand2": "GCATAA",
+      "expected": 4
+    },
+    {
+      "description": "large distance in off-by-one strand",
+      "property": "distance",
+      "strand1":  "GGACGGATTCTG",
+      "strand2": "AGGACGGATTCT",
+      "expected": 9
+    },
+    {
+      "description": "empty strands",
+      "property": "distance",
+      "strand1": "",
+      "strand2": "",
+      "expected": 0
+    },
+    {
+      "description": "disallow first strand longer",
+      "property": "distance",
+      "strand1": "AATG",
+      "strand2": "AAA",
+      "expected": -1
+    },
+    {
+      "description": "disallow second strand longer",
+      "property": "distance",
+      "strand1": "ATA",
+      "strand2": "AGTG",
+      "expected": -1
+    }
+  ]
 }