{
    "type": "object",
    "required": ["type"],
    "allOf": [{
        "$ref": "./Visit.json"
    }],
    "properties": {
        "type": {
            "type": "string",
            "enum": [
                "invalid_short_url",
                "base_url",
                "regular_404"
            ],
            "description": "Tells the type of orphan visit"
        }
    }
}