# Re: URN to URC scenario

Larry Masinter (masinter@parc.xerox.com)
Thu, 24 Feb 1994 15:57:53 PST

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    To: mitra@pandora.sf.ca.us

    Subject: Re: URN to URC scenario

    From: Larry Masinter <masinter@parc.xerox.com>

    Message-Id: <94Feb24.155808pst.2732@golden.parc.xerox.com>

    Date: 	Thu, 24 Feb 1994 15:57:53 PST

My main concern about any plan to use DNS for doing URN to URC
resolution is to make sure that URNs can remain valid and resolvable
even after the `publisher' ceases to exist, or even if a name gets
reassigned. That is, a document written and published by someone at
`foo.com' should have a URN that can be resolvable even after
`foo.com' ceases to exist in any other form, or even if `foo.com' gets
reassigned to some other organization.

Mitra's original proposal (where the URN was of the form xxx/yyy which
got turned into yyy.xxx.urn for the DNS lookup) had this property, at
least if the `urn' top level domain didn't allow for the reassignment
of names.

If you use existing domains for registering URNs, the problem is that
they DO, at least in the timeframe of the lifetime of URNs.

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