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Re: Prov-o call on Monday 12:00noon US ET

From: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
Date: Mon, 24 Oct 2011 16:05:14 +0100
Message-ID: <EMEW3|c532d5e8bebb8a2a42131ce41cc1be11n9NG5H08L.Moreau|ecs.soton.ac.uk|4EA57EAA.9030703@ecs.soton.ac.uk>
To: Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk>
CC: public-prov-wg@w3.org

On 10/24/2011 03:44 PM, Stian Soiland-Reyes wrote:
> On Mon, Oct 24, 2011 at 12:07, Luc Moreau<L.Moreau@ecs.soton.ac.uk>  wrote:
>> That's exactly the point, time is associated with generation/use, not
>> entities.
> But as we have not (as of yet) made a deliberate n-ary relationship
> Generation or Use class in PROV-O - so prov:wasGeneratedAt is
> associated with an Entity (as it can only be generated once within an
> account) and prov:assumedRoleAt with an EntityInRole (as it can only
> be prov:wasASsumedBy one Entity).
> To be fair this is not a direct mapping with PROV-DM, because it would
> allow the same entity-in-role to be prov:used by two different PEs -
> the prov:assumedRoleAt would only record time of the first such use.
> On the other hand a PE could actually be using the entity several
> times, and we don't have a way to record each of these unless we do it
> as separate roles each time. (And still can't capture the duration of
> the use)

Hi Stian,
This has always been my fear. To clarify this for everybody,
are you able to write a simple example?

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 Monday, 24 October 2011 15:05:57 UTC

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