- From: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
- Date: Thu, 08 Mar 2012 21:58:04 +0000
- To: public-prov-wg@w3.org
Hi Tim, Given the new definition of derivation adopted today, we no longer have a prov:steps attribute. So I propose to close this issue, if it's OK with you. Luc On 02/12/11 17:28, Provenance Working Group Issue Tracker wrote: > PROV-ISSUE-179 (TLebo): defaults to prov:steps="n" causes issue in PROV-O [prov-dm] > > http://www.w3.org/2011/prov/track/issues/179 > > Raised by: Timothy Lebo > On product: prov-dm > > Imposing a "default" value for prov:steps will cause issues in PROV-O, which embraces the open world. > > > From [1]: > > "It is optional to include the attribute prov:steps in an imprecise-n derivation record. It defaults to prov:steps="n"." > > > An OWL axiom such as "imprecise-n derivation records must have values of prov:step that are integers greater than 1" can be done, and if an instance of Derivation is typed to "imprecise-n derivation record", then one knows that it has more than one step -- even when no prov:step has been asserted. > > > If this OWL approach is taken, would we be violating the DM's "It defaults to prov:steps="n"."? > > Thanks, > Tim > > [1] http://dvcs.w3.org/hg/prov/raw-file/tip/model/ProvenanceModel.html#Derivation-Relation > > > >
Received on Thursday, 8 March 2012 21:59:51 UTC