Standardizing on IDNA 2003 in the URL Standard
ck at culture.org
Fri Aug 23 17:17:38 CEST 2013
> On 23/08/13 11:19, Mark Davis ☕ wrote:
>> 1. The TR46 non-letter support can be dropped in clients once the major
>> registries disallow non-IDNA2008 URLs. I say URLs, because the
>> registries need to not only disallow them in SLDs (eg http://☃.com),
>> they /also/ need to forbid their subregistries from having them in
>> Nth-level domains (that is, disallow http://☃.blogspot.ch/
>> <http://blogspot.ch/> = xn--n3h.blogspot.ch
> This is not my area of expertise, but I am not aware of a registry which
> attempts to define by contract what their customers may or may not put
> into the DNS "below" the domain they have purchased.
They don't because they can't; conceivably one level down but
certainly not Nth-level. The concept itself is arguably antithetical
to one of the fundamental attributes of the DNS but there is no
practicable way to implement such a constraint, anyway. As a timeline
effect, 1. is identical to never.
> The way to make such domains not exist is for them to first not work in
> browsers; I'm not sure we can do it the other way around.
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