{
    "$$version": 1,
    "$schema": "http://json-schema.org/draft-04/schema#",
    "$$order": [
        "top"
    ],
    "required": [
        "top"
    ],
    "title": "Nested properties",
    "type": "object",
    "additionalProperties": false,
    "properties": {
        "top": {
            "type": "object",
            "additionalProperties": false,
            "title": "Top level property with no type specified",
            "$$order": [
                "second"
            ],
            "required": [
                "second"
            ],
            "properties": {
                "second": {
                    "type": "string",
                    "title": "Second level property"
                }
            }
        }
    }
}