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Re: char equivalence classes in search - why not symmetric?


From: Juri Linkov
Subject: Re: char equivalence classes in search - why not symmetric?
Date: Fri, 11 Sep 2015 23:50:30 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (x86_64-pc-linux-gnu)

>   > I'd much rather we focus effort on making the equiv-classes easier to 
> customize.
>
> Let's not call them "equiv-classes", because that term presupposes
> symmetry.  (An equivalence relation is symmetric.)  Let's call them
> search classes for characters.

A case table can define all of them: upcase, canonicalize, and equivalence
classes, so char-folding could define equiv-classes as well.



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