Re: PROV-ISSUE-205 (optional-activity-in-generation-record): optional activity in generation record [prov-dm]

Thanks Daniel, it would be interesting to hear Stephan's view.
Luc

On 01/11/2012 02:54 PM, Daniel Garijo wrote:
> Hi Luc,
> I don't think it would affect the ontology: we could create an 
> instance of a "Generation" and say that the qualified
> entity is the generated entity. Something like:
>
> ex:g1 a wfprov:Generation;
>          prov:hadQualifiedEntity ex:generatedEntity;
>          ext:generatedAt [ time:inDateTimeXSD "2011-10-21T09:21:31Z" 
> ]. #Or whatever the user wants to use for asserting time
>
> However, I think that Stephan was against using orphan generations 
> like in the example. IMO it is a bit tricky to find
> a generation without activity, but it covers the use case.
> Best,
> Daniel
>
> 2012/1/11 Luc Moreau <L.Moreau@ecs.soton.ac.uk 
> <mailto:L.Moreau@ecs.soton.ac.uk>>
>
>     Hi Tim, Satya, all
>
>     How would the following proposal
>     /   making the activity identifier optional in the generation record/
>     would affect the ontology?
>
>     Regards,
>     Luc
>
>
>     On 12/21/2011 09:57 PM, Provenance Working Group Issue Tracker wrote:
>>     PROV-ISSUE-205 (optional-activity-in-generation-record): optional activity in generation record [prov-dm]
>>
>>     http://www.w3.org/2011/prov/track/issues/205
>>
>>     Raised by: Luc Moreau
>>     On product: prov-dm
>>
>>
>>     We may want to assert the time at which an entity is created. The placeholder for such time information is a generation record. But a generation mandates the presence of an activity identifier. But it may not be known.
>>
>>     It would be nice if the activity identifier was made optional in the generation record.
>>
>>     Does this have implications for the ontology?
>>
>>     Cheers,
>>     Luc
>>
>>
>>
>>        
>
>     -- 
>     Professor Luc Moreau
>     Electronics and Computer Science   tel:+44 23 8059 4487  <tel:%2B44%2023%208059%204487>
>     University of Southampton          fax:+44 23 8059 2865  <tel:%2B44%2023%208059%202865>
>     Southampton SO17 1BJ               email:l.moreau@ecs.soton.ac.uk  <mailto:l.moreau@ecs.soton.ac.uk>
>     United Kingdomhttp://www.ecs.soton.ac.uk/~lavm  <http://www.ecs.soton.ac.uk/%7Elavm>
>          
>
>

-- 
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