{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "definitions": {
        "MyObject": {
            "type": "object",
            "properties": {
                "prop": {
                    "type": "number"
                }
            },
            "required": [
                "prop"
            ]
        },
        "MyAlias": {
            "$ref": "#/definitions/MyObject"
        }
    },
    "$ref": "#/definitions/MyAlias"
}