{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "definitions": {
        "ThingWithCodes": {
            "type": "object",
            "additionalProperties": true,
            "title": "Thing with Codes schema.",
            "description": "An explanation about the purpose of this instance described by this schema.",
            "properties": {
                "codes": {
                    "type": "object",
                    "minItems": 0,
                    "additionalProperties": true,
                    "title": "codes schema.",
                    "description": "An explanation about the purpose of this instance described by this schema.",
                    "items": {}
                }
            }
        }
    },
    "properties": {
        "ThingWithCodes": {
            "$ref": "#/definitions/ThingWithCodes"
        }
    },
    "required": [
        "ThingWithCodes"
    ]
}