anchor.diff:  // -- file section ----------------------------------
   
   fileSection :
  -	FILE SECTION DOT
  +	FILE SECTION DOT_FS
   	(fileAndSortDescriptionEntry dataDescriptionEntry*)*
   ;
   
   fileAndSortDescriptionEntry :
  -	(FD | SD) fileName (DOT? fileAndSortDescriptionEntryClause)* DOT
  +	(FD | SD) fileName (DOT_FS? fileAndSortDescriptionEntryClause)* DOT_FS
   ;
   
   fileAndSortDescriptionEntryClause :
  
positive.code: // - source computer paragraph ----------------------------------
  
  sourceComputerParagraph :
  	SOURCE_COMPUTER DOT computerName (WITH? DEBUGGING MODE)? DOT
  ;
  
  // - object computer paragraph ----------------------------------
  
  objectComputerParagraph :
  	OBJECT_COMPUTER DOT
  	computerName objectComputerClause* DOT
  ;
  
  objectComputerClause :
  
negative.code: // --- identification division --------------------------------------------------------------------
  
  identificationDivision :
  	(IDENTIFICATION | ID) DIVISION DOT_FS
  	programIdParagraph
  	identificationDivisionBody*
  ;
  