OPEN

OPEN [EXCLUSIVE]

    { {INPUT } { file [WITH NO REWIND] } ... } ...
      {OUTPUT}        [lock-option   ]
      {I-O   }
      {EXTEND}

NOTE: lock-option may be either of these formats:

 { ALLOWING {NO OTHERS} }

            {READERS  }

            {WRITERS  }

            {UPDATERS }

            {ALL      }



 { WITH {LOCK       }   }

        {MASS-UPDATE}