- From: Luc Moreau <l.moreau@ecs.soton.ac.uk>
- Date: Wed, 1 Jul 2015 15:38:50 +0100
- To: Daniel Garijo <dgarijo@delicias.dia.fi.upm.es>
- CC: W3C Prov <public-prov-comments@w3.org>, Ivan Herman <ivan@w3.org>
- Message-ID: <5593FB7A.9000601@ecs.soton.ac.uk>
Hi Daniel, We don't have formal mappings between our representations. So, I am not sure there is an authoritative answer. Looking at activities, in prov-n, we can write: activity(a,2001-10-26T21:32:52,2001-10-26T21:32:53) This corresponds to a prov:startedAtTime 2001-10-26T21:32:52. a prov:endedAtTime 2001-10-26T21:32:53. For entities, we don't have time information allowed in prov-n: entity(e) Instead, wasGeneratedBy(e,-,2001-10-26T21:32:52) can be translated using the qualitifed pattern. e prov:hadQualifiedGeneration [ prov:atTime 2001-10-26T21:32:52] Luc On 01/07/2015 15:27, Daniel Garijo wrote: > Hi Luc, > I am sorry, but I must be missing something here. > generatedAt time (Entity->dateTime) is an attribute of Entity. > atTime (InstantaneousEvent ->dateTime) is an attirbute of Generation, > among others like End or Start. > > Example 20 in Prov-DM > (http://www.w3.org/TR/2013/REC-prov-dm-20130430/Overview.html#anexample-generation2) > states that "wasGeneratedBy(e, -, 2001-10-26T21:32:52)" is valid. And > that is equivalent to "e prov:generatedAtTime 2001-10-26T21:32:52", right? > > I still fail to see where the issue is :( > Daniel > > 2015-07-01 16:10 GMT+02:00 Luc Moreau <l.moreau@ecs.soton.ac.uk > <mailto:l.moreau@ecs.soton.ac.uk>>: > > Hi Daniel, > > Time is an attribute of generation, not of entity, as it currently > stands. > > Luc > > > On 01/07/2015 15:04, Daniel Garijo wrote: >> Hi Tim, >> are you suggesting to delete prov:generatedAtTime?? >> Example 20 in PROV-DM shows how to do the equivalent thing with DM: >> http://www.w3.org/TR/2013/REC-prov-dm-20130430/Overview.html#anexample-generation2 >> >> I think this was a very useful property for stating the creation >> time of an entity without having to qualify the generation term. >> It is also used in the prov-dc mapping. I don't understand why >> this is an issue. >> Best, >> Daniel >> >> 2015-07-01 15:37 GMT+02:00 Timothy Lebo <lebot@rpi.edu >> <mailto:lebot@rpi.edu>>: >> >> >> Please note a recent addition to the PROV Errata [1] >> regarding PROV-O’s generation and invalidation time >> properties, copied below. >> >> The entry resolves issue [2]. >> >> Thanks to Luc and his team for pointing out the disparity. >> Thanks to Ivan for publishing the revised Errata document. >> >> Regards, >> Tim >> >> >> Error o-5 >> <http://www.w3.org/2011/prov/errata.html#o-5>, >> generation and invalidation time properties have no >> equivalent in prov-dm >> >> in (22) Property: prov:generatedAtTime >> <http://www.w3.org/TR/prov-o/#generatedAtTime> and in (27) >> Property: prov:invalidatedAtTime >> <http://www.w3.org/TR/prov-o/#invalidatedAtTime>, >> prov:generatedAtTime and prov:invalidatedAtTime properties >> should not be defined because they have no equivalent in >> prov-dm and thus no equivalent in other PROV serializations. >> >> (22) Property: prov:generatedAtTime >> >> IRI:http://www.w3.org/ns/prov#generatedAtTime >> <http://www.w3.org/ns/prov#generatedAtTime> >> >> (27) Property: prov:invalidatedAtTime >> >> IRI:http://www.w3.org/ns/prov#invalidatedAtTime >> <http://www.w3.org/ns/prov#invalidatedAtTime> >> >> >> [1] http://www.w3.org/2011/prov/errata.html#o-5 >> [2] https://github.com/timrdf/prov-wg/issues/4 >> >> Timothy Lebo >> lebot@rpi.edu <mailto:lebot@rpi.edu> >> https://impactstory.org/TimothyLebo >> >> > > -- > Professor Luc Moreau > Head of the Web and Internet Science Group > Electronics and Computer Science tel:+44 23 8059 4487 <tel:%2B44%2023%208059%204487> > University of Southampton twitter: @lucmoreau > Southampton SO17 1BJ, UKhttp://www.ecs.soton.ac.uk/~lavm <http://www.ecs.soton.ac.uk/%7Elavm> > > > -- Professor Luc Moreau Head of the Web and Internet Science Group Electronics and Computer Science tel: +44 23 8059 4487 University of Southampton twitter: @lucmoreau Southampton SO17 1BJ, UK http://www.ecs.soton.ac.uk/~lavm
Received on Wednesday, 1 July 2015 14:39:47 UTC