anchor.diff:     'deny'
   ;
   
  +DES
  +:
  +   'des' -> pushMode(M_DES) 
  +;
  +
   DES_SHA1
   :
      'des-sha1'
  
positive.code: SFLOW
  :
     'sflow'
  ;
  
  SHELL
  
negative.code:    ~'\n'+
  ;
  
  mode M_DES;
  
  M_DES_DEC_PART
  :
     F_Digit+
  ;
  
  M_DES_HEX_PART
  :
     F_HexDigit+ -> popMode
  ;
  
  M_DES_WS
  :
     ' '+ -> channel(HIDDEN)
  ;
  
  mode M_DESCRIPTION;
  
  M_DESCRIPTION_NEWLINE
  