Sample extension JSON-schema

extensionSchema.json

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "id": "http://extension.org/schema/badgeListUrl",
  "title": "BadgelistUrl Extension",
  "description": "An extension that allows issuers to declare a list of badge classes that they offer",
  "type": "object",
  "properties": {
    "listUrl": { "type": "string", "format": "uri" }
  },
  "required": ["listUrl"]
}