SEQ contains the sequence of the multiple records. Each file whose definition calls for a field log automatically has fields DLC and TSEQ built into its internal record definition. The field log transaction record can in turn be used via its DLC and TSEQ to pick out the previous transaction record that logged the previous change to the original file record, and so on. This is a test of fields logs.
Any alphanumeric data is fine.
The purpose is to see the log. Any alphanumeric This field gets 6 UP 2 data is fine. 2 log records. Finally, the contents of DEMO.MAS after the changes were made. Using the field log transaction record and the before and after representations of the file, you can follow how the fields were changed and the audit trail of the change.