Joe,

Thanks for spotting this.

FWIW, it shows _exactly_ why I am concerned about two separate
sets of rules, tables, and experts for PRECIS and IDNA.   If we
can't manage to keep things synchronized when PRECIS is under
active development, with a WG that is presumably paying
attention, then getting everything right and keeping it
consistent when we are depending on a few overloaded individuals
seems implausible.   

There is, of course, an alternate hypothesis, which is that
participants in PRECIS either aren't paying attention or that
they are paying attention to the intersection of the particular
protocols and languages most of interest to them, but I can only
hope that is not the case.

best,
   john


--On Wednesday, July 30, 2014 18:48 +0000 "Joe Hildebrand
(jhildebr)" <[email protected]> wrote:

> Draft-17 of the precis-framework doc says:
> 
> "The PRECIS framework, which is defined in terms of the latest
> version    of Unicode as of the time of this writing (6.3),
> treats the character    U+19DA NEW TAI LUE THAM as DISALLOWED.
> Implementers need to be aware    that this treatment is
> different from IDNA2008 (originally defined in    terms of
> Unicode 5.2), which treats U+19DA as PVALID."
> 
> RFC 6452 amends IDNA to say:
> 
> "1.3.  U+19DA NEW TAI LUE THAM DIGIT ONE
> 
>    The GeneralCategory for this character changes from Nd to
> No.  This    implies that the derived property value changes
> from PVALID to    DISALLOWED."
> 
> So the "PVALID" part of the precis draft likely needs to
> change.
> 
> Further, I get FREE_PVAL for U+19DA, because it now hits the
> OtherLetterDigits rule (R), since its general category is No.




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