- From: Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk>
- Date: Mon, 24 Oct 2011 15:44:21 +0100
- To: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
- Cc: public-prov-wg@w3.org
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) -- Stian Soiland-Reyes, myGrid team School of Computer Science The University of Manchester
Received on Monday, 24 October 2011 14:45:13 UTC