Re: On language-dependent defaults for character-folding

[Eli Zaretskii]

> From: Juri Linkov <address@hidden>
> Cc: address@hidden,  address@hidden,  address@hidden,  address@hidden
> Date: Mon, 29 Feb 2016 02:22:02 +0200
> 
> > What I envisioned is a single variable that holds a list of folding
> > sub-features.  Examples include ignoring diacritics, matching
> > ligatures and their decompositions, "controversial" foldings that
> > users of specific languages might not want, etc.  The default value
> > will hold all of the sub-features; users that don't want some of them
> > will be able to remove them from the list, which will affect the
> > mapping at search time.  We could also have a setting that means "DTRT
> > for my locale", which will remove the sub-features inappropriate for
> > the locale's language.  Stuff like that.
> 
> Like (defcustom char-fold-defaults '(ignore-diacritics match-ligatures ...?

Yes.

> Not sure if such terms are self-descriptive.  At least plain pairs like
> '((o ø) (l ł) ...) should be enough to customize at the base character level,
> and later we might consider grouping such pairs into a more high-level
> features like ‘spanish-diacritics’, ‘swedish-diacritics’, etc.

Such grouping is what I had in mind.  I don't expect users to remember
these characters by heart.

> > I think we need to create another uni-*.el file which defines a
> > decomposition char-table populated from decomps.txt.
> 
> The name of the currently used Unicode character property is “decomposition”.
> What would be a good name for the property from decomps.txt? “decomposition2”?

I'm not good at naming stuff, but how about collating-decomposition or
decomposition-for-collation?