# Re: URN to URC scenario

Martin Hamilton (M.T.Hamilton@lut.ac.uk)
Sat, 26 Feb 1994 12:40:47 +0000 (GMT)

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    From: Martin Hamilton <M.T.Hamilton@lut.ac.uk>

    Message-Id: <199402261240.MAA16298@lust.mrrl.lut.ac.uk>

    Subject: Re: URN to URC scenario

    To: peterd@bunyip.com (Peter Deutsch)

    Date: Sat, 26 Feb 1994 12:40:47 +0000 (GMT)

    In-Reply-To: <9402252354.AA17216@expresso.bunyip.com> from "Peter Deutsch" at Feb 25, 94 06:54:18 pm

Peter D:

$ Looking at the examples, the format seems to eliminate the
$ distinction between naming authority, publisher ID and
$ resource ID that Chris and I postulated in our original
$ proposal. I think there's a problem with that.

I don't think there is necessarily a problem, e.g. if we had URNs
of the form...

urn://naming-authority:publisher/resource-id

these could map to a domain, say

publisher.naming-authority.urn[.int]

Perhaps this also gives us a good way out of the debate on what
attributes URNs should have - let's say the as-yet-hypothetical
urn domain is administered by (say) the IANA, which delegates
naming authorities on a once only basis. So, e.g. nobody can
reuse isbn.urn[.int] :-)

Futhermore, I think it would be handy to have "mutable" URNs (i.e.
long lived, but not permanent, names) can be assigned by anybody,
without having to register as a publisher and/or naming authority.
This sort of URN might look something like this...

urn://domain:foo.bar.com/resource-id

(or simply)

urn://foo.bar.com/resource-id

And resolve to a domain name

foo.bar.com

I'm assuming these domain names are subject to a TXT lookup in
the DNS, which leads to URLs for the publisher's URN->???
server(s).

Finally, I guess I should say that these are meant to be minimal
URNs, without any versioning or language info!

Would that be acceptable?

Martin

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