{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "additionalProperties": false,
    "definitions": {
        "ExternalType": {
            "type": "object",
            "additionalProperties": false,
            "properties": {
                "src": {
                    "type": "array",
                    "items": {
                        "type": "string",
                        "minLength": 1
                    }
                }
            },
            "required": ["src"]
        }
    }
}