Dynamic allocation determines whether the
z/OS® UNIX file
to be allocated is NEW, OLD, or MOD from the pathname options specified
on the DALPOPT text unit:
- The file is NEW if OEXCL and OCREAT are both specified.
- The file is MOD if OCREAT is specified but OEXCL is not specified.
- The file is OLD if OCREAT is not specified
or if the DALPOPT text unit is not specified.