anchor.diff:  SEQUENTIAL : S E Q U E N T I A L;
   SET : S E T;
   SHARED : S H A R E D;
  +SHAREDBYALL : S H A R E D B Y A L L;
  +SHAREDBYRUNUNIT : S H A R E D B Y R U N U N I T;
  +SHARING : S H A R I N G;
   SHIFT_IN : S H I F T MINUSCHAR I N;
   SHIFT_OUT : S H I F T MINUSCHAR O U T;
   SHORT_DATE : S H O R T MINUSCHAR D A T E;
  
positive.code: INTEGER : I N T E G E R;
  INTO : I N T O;
  INVALID : I N V A L I D;
  IS : I S;
  JUST : J U S T;
  JUSTIFIED : J U S T I F I E D;
  
negative.code: EXCEPTION : E X C E P T I O N;
  EXCLUSIVE : E X C L U S I V E;
  EXIT : E X I T;
  EXPORT : E X P O R T;
  EXTEND : E X T E N D;
  EXTENDED : E X T E N D E D;
  EXTERNAL : E X T E R N A L;
  