anchor.diff:      end.
   
   %%--------------------------------------------------------------------
  -%% BNF checking functions, based on RFC3261 chapter 25 
  +%% BNF checking functions, based on RFC3261 chapter 25
   %%--------------------------------------------------------------------
   is_alpha(Char) ->
  -    if 
  +    if
   	(Char >= $A) and (Char =< $Z) ->
   	    true;
   	(Char >= $a) and (Char =< $z) ->
  
positive.code: 
      ok.
  
  
  %%====================================================================
  %% Behaviour functions
  %%====================================================================
  
  %%--------------------------------------------------------------------
  %% Function: 
  %% Descrip.: 
  %% Returns : 
  %%--------------------------------------------------------------------
  
  %%====================================================================
  %% Internal functions
  %%====================================================================
  
  %%--------------------------------------------------------------------
  %% Function: 
  %% Descrip.: 
  %% Returns : 
  %%--------------------------------------------------------------------
  
negative.code: 
  
  %%--------------------------------------------------------------------
  %% Function: parse_hostport(HostPort)
  %%           HostPort = string()
  %% the host:port section of the sip url can be formated in a varity of
  %% ways:
  %%
  %% hostname:port
  %% hostname
  %% ipv4address:port
  