On Wed, 23 Mar 2005 17:08:30 -0500, Peter T. Daniels
<grammatim@...> wrote:

> What is an "abstract character"?

One example: The letter O, irrespective of case, size, font/typeface,
encoding, physical form (or lack of it), aspect-ratio modification, stroke
weight, ink or screen color, placement in relation to the writing line...

Unless I'm confusen :) , the introductory material to Unicode makes the
concept clear. Unicode, for practical reasons, needed to distinguish
between cases in writing systems that have them. (I'm thinking of Georgian
(and Armenian?), where the matter of case seems rather different.)

--
Nicholas Bodley /*|*\ Waltham, Mass.
The curious hermit -- autodidact and polymath