{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "definitions": {
        "a": {
            "type": "string"
        },
        "b": {
            "type": "object",
            "description": "I use a local reference.",
            "properties": {
                "name": {
                    "$ref": "#/definitions/a"
                }
            }
        }
    }
}