  char               * registration_;  /**< @private a registration name, e.g. "org/oyranos/imaging/scale", see as well @ref registration */

  char               * category_;      /**< @private the ui menue category for this filter, to be specified */

  oyOptions_s        * options_;       /**< @private local options */

  oyCMMapi4_s_       * api4_;          /**< @private oyranos library interfaces */
