anchor.diff:  %% Descrip.: determine if Number is a string containing only numbers,
   %%           length must be >= 1
   %% Returns : true | false
  +%% Note    : Using the BIF list_to_integer() is probably cheaper.
   %%--------------------------------------------------------------------
   isnumeric(Number) when is_list(Number) ->
       Pattern = "^[0-9]+\$",
  
positive.code: %%           LogTag = string() - application name (???)
  %%           PidIn = pid() | atom()
  %%           Message = string()
  %% Descrip.: ???
  %% Returns : ok | error
  %%--------------------------------------------------------------------
  safe_signal(LogTag, PidIn, Message) ->
  
negative.code: 	{match, List} ->
  	    apply_rewrite(Rewrite, List);
  	nomatch ->
  	    regexp_rewrite(Input, Rest)
      end.
  
  %% Function:
  