{
    "items": {
        "_id": "13",
        "properties": {
            "airport": {
                "_id": "airport",
                "properties": {
                    "name": {
                        "_id": "name",
                        "type": "string"
                    },
                    "url": {
                        "_id": "url",
                        "pattern": "^/wiki/[A-Za-z0-9-_.%(),/]*$",
                        "type": "string"
                    }
                },
                "type": "object"
            },
            "city": {
                "_id": "city",
                "properties": {
                    "name": {
                        "_id": "name",
                        "type": "string"
                    },
                    "url": {
                        "_id": "url",
                        "type": "string"
                    }
                },
                "required": [
                    "name"
                ],
                "type": "object"
            }
        },
        "required": [
            "city",
            "airport"
        ],
        "type": "object"
    },
    "minItems": 1,
    "type": "array"
}