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Re: On language-dependent defaults for character-folding


From: Eli Zaretskii
Subject: Re: On language-dependent defaults for character-folding
Date: Wed, 24 Feb 2016 19:56:07 +0200

> From: Richard Stallman <address@hidden>
> CC: address@hidden, address@hidden, address@hidden
> Date: Wed, 24 Feb 2016 08:41:46 -0500
> 
>   > > * Equivalent letters (ö and ø in Swedish).
> 
>   > Not just letters -- sequences of characters.  For example, å vs aa in
>   > Danish, or ffi vs ffi.
> 
> å and aa in Danish are equivalent, like ö and ø in Swedish.
> 
> Ligatures such as ffi are a different issue entirely.
> The relationship between ffi vs ffi is language-independent
> and similar to these two levels:
> 
>  * Different appearances of the same letter+decorations:
>    as a single code point, or as a composition.
>  
>  * Identical-looking distinct code points (Latin a and Cyrillic a).

I didn't say the 2 examples were in the same class.  My point was that
we are not talking about equivalence of _characters_, we are talking
about equivalent character _sequences_.



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