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Re: PROV-ISSUE-69 (Process Execution): Process execution occurs over a "continuous time interval"? [Conceptual Model]

From: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
Date: Fri, 05 Aug 2011 16:28:05 +0100
Message-ID: <EMEW3|699ebe3353183d7396b714a997a2f455n74GSB08L.Moreau|ecs.soton.ac.uk|4E3C0C05.7090507@ecs.soton.ac.uk>
To: public-prov-wg@w3.org

Hi Satya,

It's  the same problem as entities.

Luc is Boston (an entity)  or Travelling to Boston (a process execution) 
can occur twice, let's
say in May and in June.

How can you explain that the second occurrence was caused by the first?  
They need to be
distinct, hence continuous intervals.

How do you model your use case?  By two separate process executions.

Luc

On 08/04/2011 01:01 AM, Provenance Working Group Issue Tracker wrote:
> PROV-ISSUE-69 (Process Execution): Process execution occurs over a "continuous time interval"? [Conceptual Model]
>
> http://www.w3.org/2011/prov/track/issues/69
>
> Raised by: Satya Sahoo
> On product: Conceptual Model
>
> The current description of process execution:
> "The activity that a process execution represents has a duration, delimited by its start and its end; hence, it occurs over a continuous time interval."
>
> What if the process execution was started (at t1), paused (at t2), and restarted (at t3) terminated (at t4), then its duration is t1-t2 and t3-t4 which is not a continuous time interval.
>
> I propose that we should remove "continuous" from the above description.
>
> Best,
> Satya
>
>
>
>    

-- 
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 Friday, 5 August 2011 15:28:36 UTC

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