{
    "zone": {
        "_id": "<string> [ <class> ]",
        "_mapbody": {
            "type": {
                "_grammar": "hint"
            },
            "check-names": {
                "_grammar": "( fail | warn | ignore )"
            },
            "file": {
                "_grammar": "<quoted_string>"
            },
            "template": {
                "_grammar": "<string>"
            }
        }
    }
}