On Wed, Sep 22, 2010 at 12:34 PM, Colosi, John <[email protected]> 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
