anchor.diff:      ;
   
   macroName :
  -    | 'MODULE-COMPLIANCE'
  -    | 'OBJECT-GROUP'
  +    'OBJECT-GROUP'
       | 'OBJECT-IDENTITY'
       | 'NOTIFICATION-TYPE'
       | 'NOTIFICATION-GROUP'
  
positive.code:     '::=' 'TEXTUAL-CONVENTION' (complexAttribut ','*)+
      ;
  
  trapTypeAssignement :
      'TRAP-TYPE'
       (complexAttribut ','*)+
  
negative.code:     | name='DESCRIPTION' stringValue
      | name='MODULE' IDENTIFIER?
      | name='INCLUDES' groups
      | name='OBJECTS' objects
      | name='VARIABLES' variables
      | name='INDEX' index
  