{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "id": "http://github.com/tmarrs/presentations/blob/master/JSON-at-Work-Schema/examples/schema/ex-13-USCommonAddrSchema.json",
    "definitions": {
        "US_zipCode": {
            "type": "string",
            "pattern": "^[0-9]{5}(-[0-9]{4})?$"
        }
    },
    "properties": {
        "US_zipCode": {
            "$ref": "#/definitions/US_zipCode"
        }
    },
    "required": [
        "US_zipCode"
    ]
}