{
  "type": "object",
  "properties": {
    "city_id": {
      "$ref": "../x-primitives.json#/city_id"
    },
    "name": {
      "description": "city name",
      "type": "string"
    },
    "state": {
      "description": "city state",
      "type": ["string", "null"]
    },
    "postal_code": {
      "description": "city postal code",
      "type": ["string", "null"]
    },
    "country": {
      "description": "city country",
      "type": ["string", "null"]
    }
  },
  "additionalProperties": false,
  "required": ["name", "state", "postal_code", "country"]
}