| VMS Help RMS, RMS Control Block Macros, $XABITM *Conan The Librarian | 
    The $XABITM macro allocates and initializes a XABITM. No value is
    returned for this assembly-time operation.
    Format
      $XABITM  ITEMLIST=item-list-address,
               MODE={sensemode|setmode},
               NXT=next-xab-address
|  |