anchor.diff:  ;
   // R910
   readStmt : 
  -keyREAD  LEFTPAR  ioControlSpecList  RIGHTPAR    (   inputItemList   )?  
  -| keyREAD fformat   (    COMMA   inputItemList   )?  
  +READ  LEFTPAR  ioControlSpecList  RIGHTPAR    (   inputItemList   )?  
  +| READ format   (    COMMA   inputItemList   )?  
  +Newline
   ;
   // R1115
   useDefinedOperator : 
  
positive.code: ;
  // R552
  namelistStmt : 
  keyNAMELIST
   FORWARDSLASH  namelistGroupName  FORWARDSLASH  namelistGroupObjectList
    (     (    COMMA     )?    FORWARDSLASH  namelistGroupName  FORWARDSLASH 
  namelistGroupObjectList  )* 
  ;
  // R553
  namelistGroupObject : 
  
negative.code: 
  AlphanumericCharacter : Letter|Digit ;
  Name : Letter   (   AlphanumericCharacter  )* ;
  repChar: RepChar;
  RepChar: .;
  