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Re: PROV-ISSUE-178 (TLebo): wasStartedBy constraint between started and generated entity [prov-dm]

From: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
Date: Wed, 11 Jan 2012 11:45:09 +0000
Message-ID: <EMEW3|c7edf57a358cae0b0aff94c02be4c765o0ABjC08L.Moreau|ecs.soton.ac.uk|4F0D7645.5030404@ecs.soton.ac.uk>
To: Timothy Lebo <lebot@rpi.edu>
CC: public-prov-wg@w3.org
Hi Tim,

Yes, that's how I think your original concern can be addressed.

I will close the issue once I have incorporated your suggestions in the 
text.

Luc

On 01/05/2012 06:37 PM, Timothy Lebo wrote:
> Luc,
>
> Thanks for your response.
>
> The diagrams are very helpful for gaining an intuition for the 
> constraints.
> (I think a little more could be said than "The ordering constraints 
> are represented by triangles."  How does one read a triangle?
> The event of the line to the triangle's immediate left must precede 
> the event of the line to the triangle's immediate right?
> Giving an example reading, such as "start of a" must precede "end of 
> a" from the subfigure a, may help.)
>
> After inspecting the subfigures, I think that my original concern is 
> addressed by combining:
>
> * constraint: wasInformedBy-Definition (which creates event e),
> * interpretation: wasInformedBy-ordering (which places the second 
> start event after the first)
> * interpretation : generation-activity-ordering (which places the 
> entity between the first activity's start and end)
> * interpretation : usage-activity-ordering (which does the same thing 
> for the entity and the using activity)
>
> If that covers my original concern, please feel free to close this issue.
>
> Regards,
> Tim
>
>
> On Dec 19, 2011, at 4:10 AM, Luc Moreau wrote:
>
>> Hi Tim,
>>
>> All interpretation constraints have now been illustrated and presented
>> in section
>> http://dvcs.w3.org/hg/prov/raw-file/default/model/ProvenanceModel.html#interpretation
>>
>>
>> I think the constraint is correctly expressed, since the record 
>> wasStartedBy(a2,a1) does not
>> identify the entity e, and its generation event. If we had made it 
>> explicit, then yes, what
>> you suggest is probably right.
>>
>> I don't think any further change is required, and I propose
>> to close the issue, pending review.
>>
>> Regards,
>> Luc
>>
>> On 12/02/2011 04:19 PM, Provenance Working Group Issue Tracker wrote:
>>> PROV-ISSUE-178 (TLebo): wasStartedBy constraint between started and generated entity [prov-dm]
>>>
>>> http://www.w3.org/2011/prov/track/issues/178
>>>
>>> Raised by: Timothy Lebo
>>> On product: prov-dm
>>>
>>> Should an additional constraint be added to wasStartedBy-ordering's interpretation constraint? It currently reads:
>>>
>>> "Given two activity records denoted by a1 and a2, if the record wasStartedBy(a2,a1) holds, then the following temporal constraint holds: the start event of the activity record denoted by a1 precedes the start event of the activity record denoted by a2."
>>>
>>> but says nothing about the start event of a2 following the generation event of e.
>>>
>>> A diagram of the constraint is available athttp://dvcs.w3.org/hg/prov/raw-file/e0d6f1a69062/diagrams/activity-ordering-records-control-ordering-record.png
>>>
>>> Thanks,
>>> Tim
>>>
>>>
>>>
>>>    
>>
>> -- 
>> 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 Kingdomhttp://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 Wednesday, 11 January 2012 11:50:40 UTC

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