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Yup, as extended character-set specific/extended functions should likely be.
> From: Ken Dickey <Ken.Dickey@xxxxxxxxxxxxxx>
> Organization: BitWize Consulting
> Date: Sun, 15 Feb 2004 17:20:46 +0100
> To: Paul Schlie <schlie@xxxxxxxxxxx>, <srfi-52@xxxxxxxxxxxxxxxxx>
> Subject: Re: char-whitespace?
> On Monday 16 February 2004 12:01 am, Paul Schlie wrote:
>> (over all, it's interesting that possibly in lieu of worrying about any
>> specific character-sets, it may be more productive to define the presumed
>> display semantics of a more abstract language/platform dependant
>> character-set, ...
> I may have misunderstood, but I think that "display semantics" above the
> Unicode level is something far beyond character handling and better dealt
> with in libraries.
> Layout, ligature, and font specifics are quite involved. [I did some early
> work on multi-language support for Java/Unicode display at Apple and found it
> quite complex].
> Again, MIT/GNU Scheme aside, one seldom ships a text editor/layout engine with
> a Scheme compiler.