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Re: PROV-ISSUE-47 (third-party-provenance): How to obtain provenance from a third party known by the user [Accessing and Querying Provenance]

From: Graham Klyne <GK@ninebynine.org>
Date: Thu, 28 Jul 2011 13:40:20 +0100
Message-ID: <4E3158B4.4090807@ninebynine.org>
To: Provenance Working Group WG <public-prov-wg@w3.org>
I believe this is addressed by section 3.4 
which addresses precisely the use-case described by this issue.

Specifically, if I have the URI of a third party provenance service, and a URI 
or identifying information about the target resource, a SPARQL query can be 
constructed to locate the required provenance URI and/or data from that third 
party.  I think availability of such information is pretty much a prerequisite 
for creating any kind of third party provenance service - I can't see how it 
might work without that.

I think this may have more to do with discussion around ISSUE 46 
(http://www.w3.org/2011/prov/track/issues/46) - the extent to which the 
provenance information itself identifies the entity whose provenance it describes.


Provenance Working Group Issue Tracker wrote:
> PROV-ISSUE-47 (third-party-provenance): How to obtain provenance from a third party known by the user [Accessing and Querying Provenance]
> http://www.w3.org/2011/prov/track/issues/47
> Raised by: Luc Moreau
> On product: Accessing and Querying Provenance
> I don't understand how the proposal allows us to address http://www.w3.org/2011/prov/wiki/ProvenanceAccessScenario.
> Specifically, I consider the case where the user wants to access provenance from a third-party they know (e.g. a favorite consumer group).
> Using section 3, I can obtain one or more provenance-uris, which are known from the responding server or the document creator. 
> If my third-party is not known by the responding server or document creator, I have no mechanism to obtain a provenance-uri since I don't have have an identifier for the document I currently hold.
> A solution could be: we need a BOB-identifier to be passed around (as suggested in ISSUE-46) and a mechanism that resolves a BOB-identifier to provenance-uri.
Received on Thursday, 28 July 2011 12:59:11 UTC

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