- From: Michael Shapiro <mshapiro@ncsa.uiuc.edu>
- Date: Mon, 12 Jun 1995 23:03:36 -0500 (CDT)
- To: uri@bunyip.com
There is an implied assumption in the SGML-based URC
specifiction that URNs resolve to URCs. I think that this is a
fundamental mistake. URNs should not be required to resolve to
URCs. They should be allowed to resolve to any resource.
In section 3 "Attribute Sets", the specification states
"A ... complication arises as a result of using a URN for
the AID .... We resolve AID-1, which is a URN, and ge back a
URC (URC-2) .... What is the AID in URC-2? How do we avoid
infinite regress?"
The proposed solution is to convert the AID from a URN to
something which is not a URN, but has all the properties of a URN
in that it is a persistent name for a resource that happens not
to be a URC.
This infinite regression could also be solved if the
requirement that all URNs resolve to URCs be relaxed. Here, it
seems to me, is a perfect example of the need for a URN which
does NOT resolve to a URC.
--
Michael Shapiro mshapiro@ncsa.uiuc.edu
NCSA (217) 244-6642
605 E Springfield Ave. RM 152CAB fax: (217) 333-5973
Champaign, IL 61820
Received on Tuesday, 13 June 1995 00:07:18 UTC