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

[Eli Zaretskii]

> Date: Tue, 1 Sep 2015 10:50:22 -0700 (PDT)
> From: Drew Adams <address@hidden>
> Cc: address@hidden
> 
> > We are asking for matches that disregard the diacriticals
> > (and in case of ª also higher-order collation-order variation).
> 
> No.  You are asking for that only when you use a search pattern
> that does not use the diacriticals.  When you search with á in
> the pattern you are NOT asking for matches that disregard the
> diacriticals.  And why not?

Because á does include a diacritical.  By specifying it, the user told
us the diacriticals are important, and shouldn't be disregarded.

> > It's what the Unicode Standard recommends, and IMO it makes a
> > lot of sense.  See http://unicode.org/reports/tr10/#Searching.
> 
> I don't see that, when reading that section.  I do see that it
> explicitly calls out that behavior as an _option_:
> 
>   8.2 Asymmetric Search
>   Users often find asymmetric searching to be a useful option.

"Users often find asymmetric searching to be a useful option" sounds
like a recommendation to me.