What are INPUT PROCEDURE and OUTPUT PROCEDURE?
In the INPUT PROCEDURE, the input file is opened, records are read and edited and then are released to the sorting operation. Finally the file will be closed.
[plain]RELEASE recordname FROM inputrecord[/plain]
In the OUTPUT PROCEDURE, output file is opened, the sorted record is returned to the Output record and then the record will be written. Finally the file will be closed.
[plain]RETURN file RECORD into outputrecord[/plain]