json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "line1": {
              "type": "string"
          },
          "city": {
              "type": "string"
          },
          "state": {
              "type": "string"
          },
          "zip": {
              "$ref": "#/definitions/US_zipCode"
          },
          "country": {
              "type": "string"
          }
      },
      "additionalProperties": false,
      "required": [
          "line1",
          "city",
          "state",
          "zip",
          "country"
      ],
      "definitions": {
          "US_zipCode": {
              "type": "string",
              "pattern": "^[0-9]{5}(-[0-9]{4})?$"
          }
      }
  }