json_schema: {
      "$schema": "http://json-schema.org/draft-07/schema#",
      "$id": "https://raw.githubusercontent.com/ajv-validator/ajv/master/lib/refs/data.json#",
      "description": "Meta-schema for $data reference (JSON Schema extension proposal)",
      "type": "object",
      "required": [
          "$data"
      ],
      "properties": {
          "$data": {
              "type": "string",
              "anyOf": [
                  {
                      "format": "relative-json-pointer"
                  },
                  {
                      "format": "json-pointer"
                  }
              ]
          }
      },
      "additionalProperties": false
  }