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

From: Myers, Jim <MYERSJ4@rpi.edu>
Date: Fri, 5 Aug 2011 11:50:54 -0400
Message-ID: <B7376F3FB29F7E42A510EB5026D99EF20552A88E@troy-be-ex2.win.rpi.edu>
To: Luc Moreau <L.Moreau@ecs.soton.ac.uk>, <public-prov-wg@w3.org>
Luc - I think this is a separate use case and Satya is not arguing about PEs having an interval, If you travel to Boston over three days and you stay in a hotel, are you travelling towards Boston the whole time? Clearly this trip is distinct from any other, but whether 'travelling' occurs at all points in time or just starts and ends with some pauses is the question. Dropping 'continuously' and just saying that a process occurs over an interval would, I think, still keep different trips as different Bobs and processes, while addressing the concern that some process executions might be episodic internally.

 Jim

> -----Original Message-----
> From: public-prov-wg-request@w3.org [mailto:public-prov-wg-
> request@w3.org] On Behalf Of Luc Moreau
> Sent: Friday, August 05, 2011 11:28 AM
> To: public-prov-wg@w3.org
> Subject: Re: PROV-ISSUE-69 (Process Execution): Process execution occurs over
> a "continuous time interval"? [Conceptual Model]
> 
> 
> 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 15:51:23 UTC

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