Re: Decomposing Diacritics Allowed?

From: John Hudson (
Date: Thu Dec 16 1999 - 16:58:28 EST

At 01:01 PM 16-12-99 -0800, James E. Agenbroad wrote:

> Does "dynamic composition" and "equivalent sequences" (2.0, p.2-9)
>include composition of combining characters from their parts? Some

>Is U+0306 (brev) followed by U+0307 (dot above) the same as U+0310
>Is U+0301 (acute) twice the same as U+030B (double acute)?
>Is U+307 (dot above) twice the same as U+308 (diaresis)?


> If this has been decided and recorded could someone point me to it?
>If it has not should it be? I view all three examples as undesirable, but
>at the same time I must admit that I favor decomposition of multiple
>combining characters for Vietnamese (U+1EA4 and following).

The Vietnamese diacritic characters involve the application of two distinct
diacritics to a base character -- one an accent mark indicating
pronunciation, the other a tone mark -- so it makes sense for them to be
decomposable. I don't think this can be extended to decomposition of
diacritic marks into subatomic particles.

John Hudson

Tiro Typeworks
Vancouver, BC

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