anchor.diff:  dataDescriptionEntry :
   	INTEGERLITERAL (dataName | FILLER)? dataDescriptionEntryClause* DOT
   	| LEVEL_NUMBER_66 dataName renamesClause DOT
  -	| LEVEL_NUMBER_77 dataName dataDescriptionEntryClause* DOT
  +	| LEVEL_NUMBER_77 dataDescName dataDescriptionEntryClause* DOT
   	| LEVEL_NUMBER_88 conditionName conditionValueClause DOT
   ;
   
  
positive.code: compilerOption : 
  	APOST
  	| ARITH LPARENCHAR EXTEND RPARENCHAR
  	| LIB
  	| NOSEQ
  	| NOSTDTRUNC
  	| OPTIMIZE LPARENCHAR FULL RPARENCHAR 
  	| XOPTS LPARENCHAR SP APOST RPARENCHAR
  ;
  
  // --- identification division --------------------------------------------------------------------
  
negative.code: CLOSE : C L O S E;
  COBOL : C O B O L;
  CODE : C O D E;
  CODEPAGE : C O D E P A G E;
  CODE_SET : C O D E MINUSCHAR S E T;
  COLLATING : C O L L A T I N G;
  COLUMN : C O L U M N;
  