- From: Paul Groth <p.t.groth@vu.nl>
- Date: Sun, 24 Jul 2011 14:13:06 +0200
- To: Khalid Belhajjame <Khalid.Belhajjame@cs.man.ac.uk>
- CC: Provenance Working Group WG <public-prov-wg@w3.org>, Provenance Working Group Issue Tracker <sysbot+tracker@w3.org>
Hi Khalid But why can't I say that a newspaper article is derived from a picture at a particular time? Or for that matter over a period of time. The time is when the derivation occurred not when it applies. Thanks Paul On Jul 24, 2011, at 13:06, Khalid Belhajjame <Khalid.Belhajjame@cs.man.ac.uk> wrote: > > Hi Paul, > > I think that "Use" and "Generation" should be associated with time. > However, I don't think we should associate time to derivation. > I would argue that isDerivedFrom(b1,b2) holds all time. Although b1 and > b2 may no longer exist, isDerivedFrom(b1,b2) is still valid. > > Thanks, khalid > > > On 23/07/2011 16:46, Provenance Working Group Issue Tracker wrote: >> PROV-ISSUE-43 (derivation-time): Deriviation should have associated time [Conceptual Model] >> >> http://www.w3.org/2011/prov/track/issues/43 >> >> Raised by: Paul Groth >> On product: Conceptual Model >> >> Other relationships have time associated with them (e.g. use, generation, control) >> >> There is no optional time associated with derivation. >> >> Suggested resolution is to add the following to the definition of isDerivedFrom: >> >> - May contain a "derived from time" t, the time or time intervals when b1 was derived from b2 >> >> Example: >> isDerivedFrom(b1,b2, t) >> >> >> >> >> >> > >
Received on Sunday, 24 July 2011 12:13:36 UTC