The $XABDAT_STORE macro moves user-specified values into fields
    of the specified XABDAT. The expanded $XABDAT_STORE code executes
    at run time on a previously initialized (allocated) XABDAT, in
    contrast to the $XABDAT macro, which initializes a XABDAT at
    assembly time. The $XABDAT_STORE macro must reside in a code
    program section.

    Format

      $XABDAT_STORE  XAB=xabdat-address,

                     CDT=#creation-date-time,

                     EDT=#expiration-date-time,

                     RDT=#revision-date-time,

                     RVN=#revision-number,

                     NXT=next-xab-address