json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "nestedtest",
      "type": "object",
      "properties": {},
      "required": [
          "top"
      ],
      "definitions": {
          "top": {
              "type": "object",
              "properties": {
                  "basic": {
                      "type": "string"
                  },
                  "nested": {
                      "$ref": "#/definitions/top/definitions/defnested"
                  }
              },
              "definitions": {
                  "defnested": {
                      "type": "object",
                      "properties": {
                          "append": {
                              "type": "string"
                          }
                      }
                  }
              }
          }
      }
  }