Re: Encoding Personal Use Ideographs

I swore I wasn't going to post anything more to the threads on this  
topic, but since James is a rational and reasonable human being, I'll  
break my vow.

在 Nov 4, 2007 12:23 AM 時， James Kass 寫到：

> If IDS use would accomodate roughly 80% of CJK characters,
> and if Unicode allows applications to form glyphs for IDSequences,
> and if users need to represent as-yet-unencoded or never-to-be-
> encoded "characters" right now in plain text, is there a problem
> in using IDSequences to do so?
>

Yes.  There are several problems.  A FAQ has just been added to the  
Unicode Web site to call attention to them <http://www.unicode.org/faq/han_cjk.html#24 
, but:

1) IDSs are inadequate to provide acceptable rendering;

2) Normalization of IDSs would be necessary for operations such as  
searching and sorting and is an absolute nightmare; and

3) It is generally felt that making up *new* ideographs is a Bad Thing  
and ought not be encouraged.

I won't say that the UTC or WG2 will absolutely oppose any and all  
compositional models for Han, *but* the bar is very high indeed.  This  
approach has been bruited in Unicode pretty much since the beginning,  
and the UTC is well aware of the practical problems involved.  A  
compositional model won't fly in the UTC unless these problems are  
addressed; for all practical intents and purposes, the UTC would  
require an actual implementation, at the very least.

=====
John H. Jenkins
[email protected]