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Re: generation by two distinct activities?

From: Timothy Lebo <lebot@rpi.edu>
Date: Thu, 17 May 2012 12:51:29 -0400
Cc: public-prov-wg@w3.org
Message-Id: <C22DACBA-3D4B-4936-99D3-1F44F69C405B@rpi.edu>
To: Luc Moreau <L.Moreau@ecs.soton.ac.uk>

On May 17, 2012, at 10:14 AM, Luc Moreau wrote:

> Hi Tim,
> 
> This is "scruffy" provenance, and as such, should be accepted.

How is it scruffy?

The entity (the fixed attributes) hasn't changed, only some assertions about its provenance has.

> It wouldn't satisfy constraints though: so, it's not valid.

So the distinct purchase activity imposed new fixed attributes of my water bottle (owner:Tim), without my permission?
The entity that I'm talking about is only it's physical form (independent of squeezes).

-Tim


> 
> Luc
> 
> On 05/17/2012 03:07 PM, Timothy Lebo wrote:
>> prov-wg,
>> 
>> I know this has been discussed before, but I'm still a bit confused.
>> 
>> Can a single entity be generated by two distinct activities?
>> 
>> I think in a distributed world of multiple perspectives, different asserters would look at the same entity and "carve up" activities differently that may not be necessarily the same.
>> 
>> I'm sitting next to a water bottle.
>> That same water bottle was generated by some activity in a factory, but it was also generated by my activity of driving to Target and handing over a Visa card.
>> (and I don't care about reducing my bottle into "before I bought" and "after I bought" - I just want one bottle).
>> 
>> 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 Kingdom                     http://www.ecs.soton.ac.uk/~lavm
> 
> 
> 
Received on Thursday, 17 May 2012 16:52:06 GMT

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