06FD and 06FE should be PVALID for Sindhi

Vint Cerf vint at google.com
Wed Apr 2 01:47:26 CEST 2008

most likely we are going to have to be pragmatic. If there is  
linguistic consensus that certain characters should be re-labeled as  
to their category in the UTC system but that takes a Unicode release  
cycle, then we may find ourselves adding exceptions to IDN specs in  
advance of changes to Unicode.

This leads to an interesting question about maintenance of the  
exception tables for IDN200X - it sounds like something that should  
end up as an IANA-maintained table. Does that sound right?


On Apr 1, 2008, at 6:16 PM, Paul Hoffman wrote:

> At 9:25 PM +0100 4/1/08, Michael Everson wrote:
>> That is fine. The important thing is that they are PVALID; whether  
>> that happens with a change from "So" to "Lo" is irrelevant so long  
>> as there is an exceptions list.
> It is probably quite relevant to the IETF, which updates its  
> standards *much* more slowly than the Unicode Consortium. It is  
> also possibly relevant to the Sindhi community, given that the  
> miscasting in the Unicode Standard could affect other standards in  
> the future.
> If we (for a value of "we" that includes active Unicode Consortium  
> people) want IDNA200x to rely heavily on the Unicode Standard for  
> our decisions, then the Unicode Standard should be corrected  
> wherever possible instead of asking all the protocols to make  
> exceptions. If we want to view this more as a process where the  
> Unicode Standard is taken as mostly-but-not-completely correct,  
> then relying on other standards to have actively-maintained  
> exception lists is reasonable. I prefer the former; others might  
> want the latter. But we need to decide sooner rather than later  
> which model is most appropriate. From the messages on the thread so  
> far, these characters seem like excellent test cases.
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