From: Markus Scherer (markus.icu@gmail.com)
Date: Wed Sep 22 2010 - 15:21:16 CDT
On Wed, Sep 22, 2010 at 12:34 PM, Colosi, John <jcolosi@verisign.com> wrote:
> I think your point is that UTS #46 has a broader scope than just
> registries, and so it allows the Unicode 6.0 mapping. In fact, it’s very
> purpose seems to be a bridging of the gap between 2003 and 2008. So in a
> trivial sense, a strict reading of Idna2008 for registries will cause some
> issues.
>
Yes, IDNA2008 breaks compatibility with IDNA2003 and its many deployed
implementations. UTS #46 is an attempt to combine the useful upgrades which
IDNA2008 makes while maintaining compatibility as much as possible.
Please see the Introduction (section 1) of UTS #46; also, in section 2 it
says:
*Symbols and Punctuation. *UTS #46 supports processing of symbols and
punctuation during the transitional period. The transition will be smooth:
as registries move to IDNA2008 the DNS lookups of IDNs with symbols will
simply be refused. At that point, in practice, there is full compatibility
with IDNA2008.
Best regards,
markus
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