anchor.diff:  @lexer::header {
     package be.edmonds.occi;
   }
  +
   // ----------------------------------------
   // ---------- All OCCI Headers ------------
   // ----------------------------------------
  
positive.code:   TOKEN
  ;
  
  attributes:
    CAT_ATTR_SEP ATTRIBUTES_ATTR VAL_ASSIGN QUOTE attributes_names QUOTE
  ;
  attributes_names:
  
negative.code:   CATEGORY_HEADER category_header_val
  ;
  category_header_val:
    term_attr scheme_attr class_attr (title_attr | rel_attr | location_attr | cat_attributes_attr)*
  ;
  term_attr:
    TOKEN
  