- From: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
- Date: Mon, 24 Oct 2011 16:05:14 +0100
- 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? Luc -- 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