
  TYPE
    dst$change_date_time_options = (dsc$cdt_base_system_time, dsc$cdt_time_zone, dsc$cdt_default_date_format,
          dsc$cdt_default_time_format, dsc$cdt_daylight_saving_time),

    dst$change_date_time_set = SET OF dst$change_date_time_options;
