Set a data-system object as the dynamic default for a parameter. The given locator must be valid when DAT_DEF is called but may be annulled before the dynamic default is used.

CALL DAT_DEF ( PARAM, LOC, STATUS)

PARAM=CHARACTER$\ast$($\ast$) (given)

LOC=CHARACTER$\ast$($\ast$) (given)

STATUS=INTEGER (given and returned)