Positions 21 and 22 associate an indicator with the record type defined on this line. The normal entry is one of the indicators 01 to 99; however, the control level indicators L1 through L9 and LR can be used to cause certain total steps to be processed. If a control level indicator is specified, lower control level indicators are not set on. The halt indicators H1 through H9 can be used to stop processing. The return indicator (RT) is used to return to the calling program.
When a record is selected for processing and satisfies the conditions indicated by the record identification codes, the appropriate record identifying indicator is set on. This indicator can be used to condition calculation and output operations. Record identifying indicators can be set on or set off by the programmer. However, at the end of the cycle, all record identifying indicators are set off before another record is selected.