On Jan 12, 2006, at 8:51 AM, Russell, Richard wrote: > shouldn't difficulty in understanding and implementing be a > prime concern for introducing things not yet in there? Of course. It is a prime concern and always has been. Now all you need to do is get everyone to agree on what is or is not difficult to understand and implement. :-( Though I phrase it in a sarcastic way, I'm afraid that is actually a very serious and major point; it is *NOT* trivial, or even close. Things that I find trivial and intuitive, others find obscure and complicated; and vise versa. -- Richard Maine | Good judgment comes from experience; [log in to unmask] | experience comes from bad judgment. | -- Mark Twain