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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: |
Tue, 23 Feb 2016 20:14:55 +0200 |
> From: Richard Stallman <address@hidden>
> CC: address@hidden, address@hidden, address@hidden
> Date: Tue, 23 Feb 2016 12:43:56 -0500
>
> That is interesting. It means we need several levels of folding:
>
> * 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).
This one is a very specialized feature needed only in some marginal
use cases (like looking for the so-called "confusables" -- characters
that look the same and could be used for deception, e.g. in URLs).
> * The same letter with different decorations (o and ö in English).
>
> * Equivalent letters (ö and ø in Swedish).
Not just letters -- sequences of characters. For example, å vs aa in
Danish, or ffi vs ffi.
> Is there any need, ever, to disable the first level?
One could imagine a use case when you want to find only precomposed
characters, not their decomposed equivalents. But it should be rare
indeed.
> The other levels are language-specific, and the user might want to
> enable or disable them.
Not all of them are language-specific. Some are valid in any
language.
- Re: On language-dependent defaults for character-folding, (continued)
- Re: On language-dependent defaults for character-folding, Eli Zaretskii, 2016/02/21
- Re: On language-dependent defaults for character-folding, Lars Ingebrigtsen, 2016/02/21
- Re: On language-dependent defaults for character-folding, Elias Mårtenson, 2016/02/21
- Re: On language-dependent defaults for character-folding, Lars Ingebrigtsen, 2016/02/21
- Re: On language-dependent defaults for character-folding, Werner LEMBERG, 2016/02/22
- Re: On language-dependent defaults for character-folding, Richard Stallman, 2016/02/22
- Re: On language-dependent defaults for character-folding, Werner LEMBERG, 2016/02/22
- Re: On language-dependent defaults for character-folding, Richard Stallman, 2016/02/22
- Re: On language-dependent defaults for character-folding, Eli Zaretskii, 2016/02/22
- Re: On language-dependent defaults for character-folding, Richard Stallman, 2016/02/23
- Re: On language-dependent defaults for character-folding,
Eli Zaretskii <=
- Re: On language-dependent defaults for character-folding, Yuri Khan, 2016/02/23
- Re: On language-dependent defaults for character-folding, Richard Stallman, 2016/02/25
- Re: On language-dependent defaults for character-folding, Yuri Khan, 2016/02/25
- Re: On language-dependent defaults for character-folding, Richard Stallman, 2016/02/26
- Re: On language-dependent defaults for character-folding, Yuri Khan, 2016/02/27
- Re: On language-dependent defaults for character-folding, Richard Stallman, 2016/02/27
- Re: On language-dependent defaults for character-folding, Eli Zaretskii, 2016/02/27
- Re: On language-dependent defaults for character-folding, Eli Zaretskii, 2016/02/27
- Re: On language-dependent defaults for character-folding, Richard Stallman, 2016/02/28
- Re: On language-dependent defaults for character-folding, Yuri Khan, 2016/02/28