anchor.diff:  OPTIONAL : O P T I O N A L;
   OR : O R;
   ORDER : O R D E R;
  +ORDERLY : O R D E R L Y;
   ORGANIZATION : O R G A N I Z A T I O N;
   OTHER : O T H E R;
   OUTPUT : O U T P U T;
  
positive.code: CLASS : C L A S S;
  CLOCK_UNITS : C L O C K MINUSCHAR U N I T S;
  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;
  
negative.code: 	| LABEL | LANGUAGE | LAST | LB | LD | LEADING | LEFT | LENGTH | LESS | LIB | LIBACCESS | LIBPARAMETER | LIBRARY | LIMIT | LIMITS | LINAGE | LINE | LINES | LIST | LOCAL | LOCK | LOCKFILE | LONG_DATE | LONG_TIME | LOWER
  	| MEMORY | MERGE | MESSAGE | MMDDYYYY | MODE | MODULES | MORE_LABELS | MOVE | MULTIPLE | MULTIPLY
  	| NATIONAL | NATIVE | NEGATIVE | NETWORK | NEXT | NO | NOSEQ | NOT | NUMBER | NUMERIC | NUMERIC_DATE | NUMERIC_EDITED | NUMERIC_TIME
  	| OCCURS | ODT | OFF | OMITTED | ON | OPEN | OPTIMIZE | OPTIONAL | ORDER | ORDERLY | ORGANIZATION | OTHER | OUTPUT | OVERFLOW | OWN
  	| PACKED_DECIMAL | PADDING | PAGE | PASSWORD | PERFORM | PF | PH | PIC | PICTURE | PLUS | POINTER | POSITION | POSITIVE | PRINTING | PRIVATE | PROCEDURE_POINTER| PROCEDURES | PROCEED | PROCESS | PROGRAM | PROGRAM_STATUS | PROMPT | PROTECTED | PURGE
  	| QUEUE
  	| RANDOM | RD | READ | REAL | RECEIVE | RECEIVE_CONTROL | RECEIVED | RECORD | RECORDING | RECORDS | REDEFINES | REEL | REF | REFERENCE | REFERENCES | RELATIVE | RELEASE | REMAINDER | REMOVAL | RENAMES | REPLACE | REPLACING | REPLY | REPORTING | REPORTS | RERUN | RESERVE | RESET | RETURN | RETURNED | REVERSED | REWIND | REWRITE | RF | RH | RIGHT | ROUNDED | RUN
  