ISO 10646 character model (was Re: Last call for ISO 15924-based updates)

Roozbeh Pournader roozbeh at
Fri Mar 13 19:34:26 CET 2009

On Fri, 2009-03-13 at 15:25 +0100, Keld Jørn Simonsen wrote:
> W should rather use the ISO standards here, and we do in IETF.
> In ISO 10646 the character "a with acute" can only be represented 
> in one way. namely as U00E1. The other string you are citing is two
> characters in ISO 10646 (and not the "a with acute" character).

I'm really surprised! Would you please quote chapter and verse?

On a separate note, "a with acute" was just an example. For a better
example, that is also real life, consider the Lithuanian letter LATIN
SMALL LETTER A WITH OGONEK AND ACUTE. It's not representable with one
character in either Unicode or ISO/IEC 10646. You would need a character
sequence, like U+0105 U+0301. Here, U+0301 has "Inherited" as its


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