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Re: PROV-ISSUE-522: Data Model Section 5.3.4 [prov-dm]

From: Luc Moreau <l.moreau@ecs.soton.ac.uk>
Date: Mon, 08 Oct 2012 14:19:23 +0100
Message-ID: <EMEW3|1f904a1d44025b4d9d7ca8292ea53b16o97EJN08l.moreau|ecs.soton.ac.uk|5072D2DB.1040007@ecs.soton.ac.uk>
To: Khalid Belhajjame <Khalid.Belhajjame@cs.man.ac.uk>
CC: public-prov-wg@w3.org
Hi Khalid,

I have toned down the suggestion, and said this scenario may be modelled 
in that way.

If we remove this paragraph, what do you suggest we write instead, as a way
of modelling the proposed scenario.

Cheers,
Luc

On 10/03/2012 01:31 PM, Khalid Belhajjame wrote:
> In the response to this issue, it is said that "If in an application,
> it is necessary to express that a delegation takes place over an
> interval(evt1-evt2) and followed by a delegation during interval
> (evt2-evt3), the approach is to model this with two activities, one
> for the first interval, or one for the second interval, and two
> relations actedOnBehalfOf, one for each activity."
>
> I think this is too strong, it implies that the design "Plan" and
> composition of activities will be driven by the interval of time
> people are available to perfom the activities, as opposed to the task
> carried out by activities. I would, therefore, opt for removing the
> above statement from the response.
>
> Regards, khalid
>
> On 25 September 2012 14:43, Luc Moreau <l.moreau@ecs.soton.ac.uk> wrote:
>> Dear all,
>>
>> Here is a draft response for issue-522,
>> http://www.w3.org/2011/prov/wiki/ResponsesToPublicComments#ISSUE-522_.28Activity_Delegation.29
>>
>> Feedback appreciated.
>> Regards
>> Luc
>>
>> ISSUE-522 (Activity Delegation)
>>
>> Original email:
>> http://lists.w3.org/Archives/Public/public-prov-wg/2012Sep/0112.html
>> Tracker: http://www.w3.org/2011/prov/track/issues/522
>> Group Response
>>
>> Our response to ISSUE-521 partly addresses this issue.
>> PROV delegations are not temporal relations. Instead, prov-constraints
>> define ordering constraints that are implied by delegations: the responsible
>> agent has to precede or has some overlap with the subordinate agent.
>> If in an application, it is necessary to express that a delegation takes
>> place over an interval(evt1-evt2) and followed by a delegation during
>> interval (evt2-evt3), the approach is to model this with two activities, one
>> for the first interval, or one for the second interval, and two relations
>> actedOnBehalfOf, one for each activity.
>>
>> References:
>>
>> Delegation ordering constraints:
>> http://www.w3.org/TR/2012/WD-prov-constraints-20120911/#actedOnBehalfOf-ordering
>> Issue raised against prov-constraints:
>> https://www.w3.org/2011/prov/track/issues/559
>>
>> Changes to the document: none, but issue raised against prov-constraints
>> Original author's acknowledgement:
>>
>> [edit]
>>
>>
>>
>> On 10/09/2012 09:49, Provenance Working Group Issue Tracker wrote:
>>
>> PROV-ISSUE-522: Data Model Section 5.3.4   [prov-dm]
>>
>> http://www.w3.org/2011/prov/track/issues/522
>>
>> Raised by: Luc Moreau
>> On product: prov-dm
>>
>>
>> http://www.w3.org/2011/prov/wiki/LC_Feedback#Data_Model_Section_5.3.4
>>
>>
>> ISSUE-463
>>
>>
>> See comments for section 5.3.3. Can activities delegate to other agents, or
>> can only entity agents delegate to other entities? (I assume the intent is
>> to restrict delegation to only entity agents.)
>>
>> Delegations are only valid for a given window of time, so start and end
>> times should be added.
>>
>>
>>
>>
>>
>>
>>
>> --
>> 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
>>

-- 
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
Received on Monday, 8 October 2012 13:20:03 UTC

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