
  TYPE
    ift$advance_count_range = 1 .. 256,
    ift$advance_unit = (ifc$advance_logical_line, ifc$advance_logical_page,
      ifc$advance_to_input, ifc$advance_all_queued_output),
    ift$repeat_count_range = 1 .. 256,
    ift$repeat_unit = (ifc$repeat_logical_line, ifc$repeat_logical_page,
      ifc$repeat_from_input),
    ift$repeat_level = (ifc$repeat_current, ifc$repeat_suspended_1);
