{
  "$id": "https://example.com/address.schema.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "foo": {
      "type": "object",
      "enum": [1, 2, 3]
    },
    "bar": {
      "$ref": "#/properties/foo"
    }
  }
}