anchor.diff:  %% Descrip.:
   %% Returns :
   %%--------------------------------------------------------------------
  -insert(Regexp, Flags, Class, Expire, Address) ->
  +insert(Regexp, Flags, Class, Expire, Address) when is_list(Regexp), is_list(Flags), is_atom(Class),
  +						   is_integer(Expire); Expire == never, is_list(Address) ->
       db_util:insert_record(#regexproute{regexp = Regexp, flags = Flags, class = Class,
   			       expire = Expire, address = Address}).
   
  
positive.code: 	 create/1,
  	 insert/5,
  	 list/0,
  	 purge_class/2,
  	 convert_urls/0
  	]).
  
  %%--------------------------------------------------------------------
  
negative.code: %%--------------------------------------------------------------------
  list() ->
      db_util:tab_to_list(regexproute).
  
  %%--------------------------------------------------------------------
  %% Function:
  