json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "id": "http://www.52north.org/schema/json/sos/response/Response#",
      "type": "object",
      "required": [
          "request",
          "service",
          "version"
      ],
      "properties": {
          "request": {
              "type": "string"
          },
          "version": {
              "type": "string",
              "enum": [
                  "1.0.0",
                  "2.0.0"
              ]
          },
          "service": {
              "type": "string",
              "enum": [
                  "SOS"
              ]
          }
      }
  }