If you omit the DISP parameter or one of its subparameters, the
system supplies default values.
If the data set status is omitted, the system assumes NEW. If
the second or third subparameter is omitted, the system determines
how to handle the data set according to the status of the data set:
- Data sets that existed before the job are automatically kept.
The system treats a data set as existing when the status is OLD,
SHR, or MOD with volume information.
- Data sets created in the job are automatically deleted. The
system treats a data set as newly created when the status is NEW,
omitted, or MOD without volume information.