Add schemaurl def

Signed-off-by: Fabio José <[email protected]>

Author: fabiojose

ext/spec_0_2.json

@@ -32,6 +32,9 @@
         "time": {
           "$ref": "#/definitions/time"
         },
+        "schemaurl": {
+          "$ref": "#/definitions/schemaurl"
+        },
         "type": {
           "$ref": "#/definitions/type"
         },
@@ -58,6 +61,10 @@
       "format": "date-time",
       "type": "string"
     },
+    "schemaurl": {
+      "type": "string",
+      "format": "uri"
+    },
     "type": {
       "type": "string",
       "minLength": 1