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Re: Proposed change to draft-kindberg-tag-uri: tags and "newsml" URNs

From: Tim Kindberg <timothy@hpl.hp.com>
Date: Fri, 04 Mar 2005 07:28:29 +0000
Message-ID: <42280E1D.6080901@hpl.hp.com>
To: John Cowan <jcowan@reutershealth.com>
Cc: Larry Masinter <LMM@acm.org>, uri@w3.org, sandro@w3.org, abcoates@londonmarketsystems.com, m_director_iptc@dial.pipex.com, daniel.rivers-moore@rivcom.com

Isn't it OK that the owner of the IP number implicit in 
e7fe1b91-8cd5-0310-98dd-2f12e793c5e8 might not be able to say what that 
particular UUID was used for? That doesn't affect the usefulness of this 
particular ID as a repository identifier.

Or take the Atom blog entry with an id of 
tag:blogger.com,1999:blog-3063265 -- is there something wrong because 
blogger.com might not have a direct way of knowing exactly what it was 
the id of?

Of course, there is a social protocol at work here (how could one have a 
naming system without one?); e.g. if someone minted tags beginning 
tag:timothy@hpl.hp.com,2005-03-04: without my permission then there 
could be problems -- just as they shouldn't mint UUIDs from my machine's 
IP number.

If "denotational accountability" was an issue in a particular 
application context then I would expect a protocol to arise for dealing 
with that. Tags don't *have* to be used opaquely.

Cheers,

Tim.

John Cowan wrote:
> Larry Masinter scripsit:
> 
> 
>>Yes, there are two separate namespaces that both use
>>dates and named "name minters", but urn:newsml actually
>>identify resources, and the nature of the resource identified
>>can be determined by asking the Provider identified with
>>the ProviderId,
> 
> 
> (Identified at the date specified by the DateId, provided that Provider
> is still extant.)
> 
> 
>>while with 'tag', there is no authority to ask, and all of the semantics
>>are inferred from the context of use.
> 
> 
> So if I ask a tag minter at example.com "What did you mean by <tag:example.com,
> 2005:whatever>?", it's perfectly in order for the tag minter to reply
> "I have no clue"?
> 
> This is a social, not a protocol, question.
> 

-- 

Tim Kindberg
hewlett-packard laboratories
filton road
stoke gifford
bristol bs34 8qz
uk

purl.org/net/TimKindberg
timothy@hpl.hp.com
voice +44 (0)117 312 9920
fax +44 (0)117 312 8003
Received on Friday, 4 March 2005 07:29:09 GMT

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