Folgende Syntax wird für das OPEN Statement erkannt:

>>-OPEN--------------------------------------------------------->

   .---------------------------------------------------------.   
   |          .------------------------------------------.   |   
   V          V                                          |   |   
>----+-INPUT----file-name-1--+-------------------------+-+-+-+-><
     |                       +-REVERSED----------------+   |     
     |                       '-+------+--NO REWIND-----'   |     
     |                         '-WITH-'                    |     
     |         .--------------------------------------.    |     
     |         V                                      |    |     
     +-OUTPUT----file-name-2--+---------------------+-+----+     
     |                        '-+------+--NO REWIND-'      |     
     |                          '-WITH-'                   |     
     |      .-------------.                                |     
     |      V             |                                |     
     +-I-O----file-name-3-+--------------------------------+     
     |         .-------------.                             |     
     |         V             |                             |     
     '-EXTEND----file-name-4-+-----------------------------'