Re: New PROV Errata entry

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
University of Southampton          twitter: @lucmoreau
Southampton SO17 1BJ, UK           http://www.ecs.soton.ac.uk/~lavm