Tables and contextual rule for IDEOGRAPHIC ITERATION MARKs

"Martin J. Dürst" duerst at
Thu Apr 9 10:54:21 CEST 2009

On 2009/04/09 17:31, Patrik Fältström wrote:
> On 9 apr 2009, at 09.59, Martin J. Dürst wrote:
>> I understand that there is a desire to add some context constraints for
>> middle dot, but I don't understand why we need constraints for
>> Ideographic Iteration Mark.
> Martin, the middle dot is a DISALLOWED codepoint due to the rules we
> have agreed to,

Okay for the middle dot. But this (as the changed subject shows) is
about a different character.

> that refer to the properties Unicode Consortium has
> decided upon. What we try to do now is to understand under what
> circumstances (if any) IETF should override the decision made by UTC to
> treat it as a punctuation.
> We have made such decisions for other codepoints, but the charter say we
> have to be careful.
> So I do not see the current discussion be strange at all.
> We even add contect rules as exceptions for codepoints that where
> supposed to be PVALID if we "just" took the rules from UTC straight out
> of the box!

I'm fine with that if there's a good reason for it. And I'm sure that 
for those that we currently have, there is a good reason.

I still don't see why we need contextual rules for the IDEOGRAPHIC 
ITERATION MARK (U+3005). But maybe that's just because I'm too used to 
it because I read and write Japanese. For me, it sounds about the same 
as if we would say that we have to create some context rules for 'ü' (or 

Regards,    Martin.

#-# Martin J. Dürst, Professor, Aoyama Gakuin University
#-#   mailto:duerst at

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