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RE: URNs, Namespaces and Registries

From: Booth, David (HP Software - Boston) <dbooth@hp.com>
Date: Wed, 9 Aug 2006 11:54:07 -0400
Message-ID: <EBBD956B8A9002479B0C9CE9FE14A6C20B93BB@tayexc19.americas.cpqcorp.net>
To: "Schleiff, Marty" <marty.schleiff@boeing.com>, <www-tag@w3.org>

Hi Marty,

> From: www-tag-request@w3.org [mailto:www-tag-request@w3.org] 
> On Behalf Of Schleiff, Marty
> . . .
> Not all identifiers are intended to persist indefinitely. Some
> identifiers (e.g., DDNS IP addresses) actually are intended to be
> re-issued as needed. . . . 
> It think that one-time pseudonymns (like those used in assertions to
> avoid profiling and protect privacy) are also somehow relevant to the
> topic of persistence. 

Ineresting use case!  Transient URIs can also be handled using
specialized HTTP prefix URIs, as described in 
http://dbooth.org/2006/urn2http/ .  I've just added this to the FAQ:
http://dbooth.org/2006/urn2http/#FAQ .

> . . .
> I agree that persistent identifiers is a management issue and not a
> technology issue, and that it's up to the identifier minters 
> to enforce
> the degree of persistence they choose. However, there is value to a
> consistent syntactic method for the minters to manifest their 
> intentions
> with respect to persistence and convey those intentions to another
> party. A company such as mine has literally thousands of customer,
> supplier, and partner companies -- it would pretty difficult for me to
> keep track of the variety of approaches each partner might use to
> indicate persistence.

Good point.  This can also be done using specialized http prefix URIs.
I've just added this to the FAQ also:
http://dbooth.org/2006/urn2http/#FAQ .  Here are the techniques
- The owner of the specialized HTTP prefix can use the rest of the URI
to delegate minting authority to other URI owners, such as:

- In effect, a class of specialized HTTP prefixes can be defined, and
individually owned prefixes can declare themselves to be members of that
class.  For example, if the term
http://xyzconsortium.org/terms/xyzprefix is defined to indicate that
something is a specialized xyz HTTP prefix, then metadata served
(indirectly) via http://foo.com?fum can indicate that "http://foo.com?"
is a http://xyzconsortium.org/terms/xyzprefix , and metadata served
(indirectly) via http://bar.com?bee can also indicate that
"http://bar.com?" is a http://xyzconsortium.org/terms/xyzprefix .  

David Booth, Ph.D.
HP Software
Phone: +1 617 629 8881
Received on Wednesday, 9 August 2006 16:03:01 UTC

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