John,
I am referring to the ligature table in the Windows keyboard driver files,
not to ligatures as you are discussing them.
MichKa
Michael Kaplan
Trigeminal Software, Inc. -- http://www.trigeminal.com/
----- Original Message -----
From: "John Hudson" <tiro@tiro.com>
To: <unicode@unicode.org>
Sent: Sunday, December 16, 2001 7:00 PM
Subject: Re: Plane One use, was Re: HTML Validation
> At 18:09 12/16/2001, Michael \(michka\) Kaplan wrote:
>
> > > Keyboards as defined in the DDK return a table of keystroke to
character
> > > pairs (I'm ignoring deadkeys and ligatures).
> >
> >My suggestion here is to add surrogate pairs to the ligature table. After
> >all, what is a ligature in that table but multiple code points that are
> >entered via a single keystroke? While technically they were not really
> >thinking about supplementary characters, do you see any actual issue that
> >would block this from working?
>
> Ligatures are not generally entered via a single keystroke: they are glyph
> representation of multiple characters that are usually entered
> individually. The notion of handling surrogate pairs via ligature
> substitutions was discussed a couple of months ago on the OpenType list,
> and the view of font developers seems pretty unanimous that this is a Bad
> Idea. Handling surrogate pairs is something that should be happen in
> character space, not in glyph space, which means that it properly belongs
> in something like Uniscribe, not in the glyph substitutions tables of
> individual fonts. The font support should be limited to providing the
> correct cmap table format to support supplementary plane characters.
>
> John Hudson
>
> Tiro Typeworks www.tiro.com
> Vancouver, BC tiro@tiro.com
>
> ... es ist ein unwiederbringliches Bild der Vergangenheit,
> das mit jeder Gegenwart zu verschwinden droht, die sich
> nicht in ihm gemeint erkannte.
>
> ... every image of the past that is not recognized by the
> present as one of its own concerns threatens to disappear
> irretrievably.
> Walter Benjamin
>
>
>
This archive was generated by hypermail 2.1.2 : Sun Dec 16 2001 - 21:55:49 EST