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