- From: James Cheney <jcheney@inf.ed.ac.uk>
- Date: Thu, 19 Apr 2012 00:33:16 +0100
- To: Luc Moreau <L.Moreau@ecs.soton.ac.uk>, Provenance Working Group <public-prov-wg@w3.org>, Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk>
OK, I've posted my thoughts on this, and a proposal, at: http://www.w3.org/2011/prov/wiki/Optional_arguments (Sorry this is a bit long, but I think it is worth being a little pedantic here). I'd like to keep this open for discussion, but don't think it's a blocking issue. --James On Apr 18, 2012, at 10:43 AM, James Cheney wrote: > Hi, > > I have been working on the optional arguments in part 2, and I am still not sure what to write baed on what is in part 1 now. I am trying to formulate a proposal to see if I am on the right track. So I think this should be kept open for now (maybe it should be reassigned to prov-dm-constraints). > > --James > > > On Apr 18, 2012, at 7:51 AM, Luc Moreau wrote: > >> Hi Stian, >> Can we close this issue now? >> Regards, >> Luc >> >> On 04/02/2012 03:58 PM, Luc Moreau wrote: >>> Hi Stian, >>> >>> If you follow [1] below, you will now find our proposed answer to optional arguments. >>> It contains explicit links to prov-dm part 2. >>> >>> I propose to close this issue pending your review. >>> Regards, >>> Luc >>> >>> >>> On 03/30/2012 04:12 PM, Luc Moreau wrote: >>>> >>>> Hi Stian, >>>> >>>> I have been thinking about your suggestion on optional arguments. >>>> I looked at all the optional arguments [1] in prov-dm. >>>> >>>> Most of them, I believe, imply existential quantification. >>>> >>>> It would be nice to have this confirmed, and then we can write it up in part 2. >>>> >>>> Luc >>>> >>>> [1] http://dvcs.w3.org/hg/prov/raw-file/default/model/optional.html >>>> >>>> On 13/03/2012 11:05, Provenance Working Group Issue Tracker wrote: >>>>> PROV-ISSUE-311 (clarify-optionals): Clarify optional arguments in DM [prov-dm] >>>>> >>>>> http://www.w3.org/2011/prov/track/issues/311 >>>>> >>>>> Raised by: Stian Soiland-Reyes >>>>> On product: prov-dm >>>>> >>>>> There seems to be some confusion over any of the 'optional' arguments in >>>>> PROV-DM/PROV-N. >>>>> >>>>> It is unclear if this means that the argument is *implied* (ie. >>>>> existential quantification/bnodes in OWL/RDF) or not applicable/not present (NIL). >>>>> >>>>> It might be good to go through all of the optionals in PROV-DM and make sure they make that clear. >>>>> >>>>> For instance: >>>>>> Generation, written wasGeneratedBy(id,e,a,t,attrs) in PROV-N, has the following components: >>>>>> id: an optional identifier for a generation; >>>>>> entity: an identifier for a created entity; >>>>>> activity: an optional identifier for the activity that creates the entity; >>>>>> time: an optional "generation time", the time at which the entity was completely created; >>>>>> attributes: an optional set of attribute-value pairs that describes the modalities of generation of this entity by this activity. >>>>> Change to: >>>>> >>>>> >>>>>> Generation, written wasGeneratedBy(id,e,a,t,attrs) in PROV-N, has the following components: >>>>>> id: an optional identifier for a generation, if unspecified the identifier is not known; >>>>>> entity: an identifier for a created entity; >>>>>> activity: an optional identifier for the activity that creates the entity, if unspecified activity is still implied, but unknown; >>>>>> time: an optional "generation time", the time at which the entity was completely created, if unspecified the time is unknown or not applicable; >>>>>> attributes: an optional set of attribute-value pairs that describes the modalities of generation of this entity by this activity, if unspecified an empty set is implied. >>>>> >>>>> >>>>> >>>> >>> >> >> -- >> 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 >> >> >> > > > -- > The University of Edinburgh is a charitable body, registered in > Scotland, with registration number SC005336. > > > -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.
Received on Wednesday, 18 April 2012 23:34:15 UTC