Re: Character folding in the pretest

[Paul Eggert <eggert@cs.ucla.edu>]

On 02/04/2016 09:45 AM, Eli Zaretskii wrote:
> We should instead cater to users who search text they_can_  read.

This depends on what one means by "read". I can "read" Swedish in the 
sense that I know where the word boundaries are and have some idea of 
how they're pronounced. I can also "read" Belarusian in the sense that I 
know Cyrillic and a bit of Russian and can follow Belarusian better than 
Swedish, though I easily get lost. In both cases, I'd prefer 
Unicode-type case folding even though it's "wrong" to ignore diacritics 
in the native languages.

Conversely, I can't "read" Hebrew or Chinese or Arabic in the same sense 
and so don't much care how folding works for those language. Perhaps 
some Hebrew-speaking experts want פּ and פ and ף to be treated the same 
while searching, while other experts do not; it doesn't matter to me.

To help provide context here, most of my reading of non-English text is 
to support other free projects such as the tz database. That database is 
mostly English but contains short passages from other languages. I use 
Emacs for primary database maintenance, but often use other programs to 
browse the Internet as they're more convenient. I'll cut and paste out 
of a Firefox browser between a page of interest and Google Translate, 
for example. Examples of text under Emacs control include "Bahía", "Lịch 
hai thế kỷ", "中国科技史料", and "Новый счет времени". Most of the 
searching for this sort of thing in Emacs will involve typing strings 
like "bahia" and "lich" where I almost always prefer diacritic- and 
case-folded search.