It might be useful to compare this to labels like _tcp that appear in SRV
records and elsewhere.   Those are not listed in the SUDN registry.   I
think that this also doesn't make sense to list there.   It's an
interesting question, of course, but I think we have a precedent that
answers is.

On Tue, May 15, 2018 at 5:53 AM, Tony Finch <d...@dotat.at> wrote:

> Warren Kumari <war...@kumari.net> wrote:
> >
> > The authors are in disagreement - RFC6761 talks about "Special-Use Domain
> > *Names*", not "Special-Use Domain *Labels*", but Stuart has said that it
> > wasn't intended to be only for TLDs / pseudo-TLDs / things starting at
> the
> > top of the tree.
>
> Hmm. I think that if RFC 6761 were supposed to cover arbitrary labels then
> it ought to have said something about localhost as a subdomain.
>
> > So, please, *clearly* state if you think that this:
> > A: is a SUN
> > B: is not a SUN
>
> KSK-sentinel feels like a new kind of thing, but I guess it has a lot in
> common with let-localhost-be-localhost. So I think our answer should be
> the same for both of them.
>
> My initial reaction was (B), but after I compared with localhost I think
> (A) is probably the right answer.
>
> Tony.
> --
> f.anthony.n.finch  <d...@dotat.at>  http://dotat.at/
> Humber, Thames, Dover, East Wight: Northerly 5 or 6. Slight or moderate.
> Fog
> patches. Moderate, occasionally very poor.
>
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