From: Brian Candler <b.candler@...>
Date: 2009-07-30T02:28:12+09:00
Subject: Re: upcase in 1.9.2-preview1

Iñaki Baz Castillo wrote:
> 2009/7/29 Brian Candler <b.candler@pobox.com>:
>> That is: only ASCII characters (potentially encoded as UTF16 or
>> whatever) are eligible for case conversion.
> 
> Is it the correct approach?
> For me it's very clear that the upcase version of á is Á.

There are perfectly clear Unicode rules for case conversion, but they 
are not simple. In some cases you need to replace one character by two 
(e.g. ß to SS)

There is a useful discussion about this from Python's point of view 
here:
http://bytes.com/groups/python/22883-convert-unicode-lower-uppercase
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