On 1 February 2018 at 16:20, Andrew Sullivan <a...@anvilwalrusden.com> wrote:

> I am not convince that "it should not" is true, and having thought
> about this a little more it seems to me that an IANA registry should
> have been created in the first place for this sort of miserable
> in-label hack.  If it had been, we could have done something useful
> here.  And if we don't do so now, in short order we're going to be
> into the multi-level underscore-label hell that underscore labels are.

I recall that when I once read a sentence to the effect that, "xn-- is
defined to signal punycode, and no other label of the form ^..\-\- may
exist in the DNS," my first thought was that this was silly, and it should
simply have been defined as the first entry in a new registry.

So yes, I'll review and comment.
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