{

"$schema": "http://json-schema.org/draft-04/schema#",
"definitions": {
  "comment": {
    "type": "object",
    "properties": {
      "string": {
        "type": "string"
      },
      "location": {
        "$ref": "location.json"
      }
    },
    "required": ["string", "location"]
  }
},
"title": "Comment associated with a declaration or a member",
"oneOf": [
  {
    "$ref": "#/definitions/comment"
  },
  {
    "type": "null"
  }
]

}