Re: Unicode Search Engines

From: Doug Ewell (dewell@adelphia.net)
Date: Thu Feb 21 2002 - 11:11:30 EST


Martin Kochanski <unicode@cardbox.net>
To: "Unicode List" <unicode@unicode.org>
Sent: Thursday, February 21, 2002 3:50 am
Subject: Re: Unicode Search Engines

> What happens if Unicode 3.3 defines a new precomposed character (such as
> q-tilde)? Does this mean that all existing documents might become
retrospectively
> unnormalised and therefore invalid?

Yes, it would, which is why Unicode isn't going to define any new
precomposed characters that can already be composed.

The WG2 "Principles and Procedures" document would make especially good
reading:

    http://std.dkuug.dk/JTC1/SC2/WG2/docs/n2352r.pdf

In particular, check section G.2, "Implications of Normalization on
Character Encoding."

-Doug Ewell
 Fullerton, California



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