W3C home > Mailing lists > Public > public-prov-wg@w3.org > October 2012

Re: prov-dm issues under review

From: Luc Moreau <l.moreau@ecs.soton.ac.uk>
Date: Fri, 19 Oct 2012 12:23:49 +0100
Message-ID: <EMEW3|a73d753505b4b4d5a8225ff80d701c89o9ICNp08l.moreau|ecs.soton.ac.uk|50813845.10204@ecs.soton.ac.uk>
To: Paul Groth <p.t.groth@vu.nl>
CC: Provenance Working Group WG <public-prov-wg@w3.org>

Hi Paul,

On 10/17/2012 07:23 PM, Paul Groth wrote:
> Hi Luc,
> I'm fine with all proposed resolutions except for two:
> For ISSUE-529
> - Add to "Prov-dm, as a conceptual model, leaves the implementation of
> these inherited types to concrete serializations." Thus,
> serializations can support hadMember as a list. This would I believe
> address the reviewers comment specifically.
I have added the following:

As to the question of why doesn't PROV-DM have a list of members as an 
attribute of Collections, the design of prov-dm makes all associations 
between PROV entities relations. In effect, this allows us to understand 
the structure of a provenance graph, just by looking at the relations, 
without having to process attributes of entities. A given implementation 
may also to decide to represent collection members as attributes if it 
finds it convenient.

> ISSUE-499
> - I think the clarification provided is clear but we could do more to
> address the recommendation that somehow the definitions seem circular.
> Can we say the words "instant" or immediate in these definitions. We
> often make appeals to prov-constraints but I believe that PROV-DM
> should stand on its own.

We could add the following after the definition of 
generation/usage/invalidation/start/end in PROV-DM:

- Given that a generation is the completion of production of an entity, 
it is instantaneous.
- Given that an invalidation is the start  of destruction, cessation, or 
expiry, it is instantaneous.
- Given that a usage  is  the beginning of utilizing an entity, it is 
- Given that a start is when an activity is deemed to have started, it 
is instantaneous.
- Given that an end is when an activity is deemed to have ended, it is 

Would it address your concerns?


> Thanks
> Paul

Professor Luc Moreau
Electronics and Computer Science   tel:   +44 23 8059 4487
University of Southampton          fax:   +44 23 8059 2865
Southampton SO17 1BJ               email: l.moreau@ecs.soton.ac.uk
United Kingdom                     http://www.ecs.soton.ac.uk/~lavm
Received on Friday, 19 October 2012 11:24:23 UTC

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