# Re: Internet Draft on URNs

Michael Mealling (ccoprmm@oit.gatech.edu)
Sun, 16 May 93 22:35:01 EDT

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    From: ccoprmm@oit.gatech.edu (Michael Mealling)

    Message-Id: <199305170235.AA09403@oit.gatech.edu>

    Subject: Re: Internet Draft on URNs

    To: winograd@interval.com (Terry Winograd)

    Date: Sun, 16 May 93 22:35:01 EDT

    In-Reply-To: <9305161659.AA24735@interval.interval.com>; from "Terry Winograd" at May 16, 93 9:59 am

Terry Winograd said this:
>
> Definition: A GENERAL CITATION is a form containing ONE OR MORE of the
> following:
> 1. ONE OR MORE URLs. Note that it may be useful to include
> multiple alternatives, such as location in a local cache and another
> location in a costly but stable and secure archive.
>
> 2. ONE OR MORE URNs, with at most one from a single naming authority.
> A single item may be given unique names by more than one authority,
> such as ISBN and Library of Congress. This means that two distinct
> URNs may in fact refer to the same item, if they are from different
> authorities.
>
> 3. ONE OR MORE further descriptors (URIs) designed to convey
> information about the entity (e.g., title, author, date, etc.).

That sounds like the URT (Universal Resource Template) thingy I was talking
about at Columbus. The gist of it was that a citation for template would
be formatted as sequence of one or more UR* in the data element/value pair
template format that things stuch as the IAFA templates are in. For example,
to instantiate a specific occurence of a resource in both the location space
of URLs and the unique space of URNs you could have a URN and URL pair
formatted like this:

URL:http://www.gatech.edu/TechHome.html
URN:IANA::234.433.234

Plus if we decide on someway to format metainformation then that could
go in the template or citation as well so that you could pass around that
whole block as one record. The reason I like the UR*:value bit is that
if fits nicely into the whole Year of the Template series.

(Sorry to try and start a new thread there. ;-)

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