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Re: prov-issue-11: what is version?

From: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
Date: Tue, 28 Jun 2011 17:03:32 +0100
Message-ID: <EMEW3|2b5326ef1856531c7870c0384c4822a9n5RH4l08L.Moreau|ecs.soton.ac.uk|4E09FB54.9010609@ecs.soton.ac.uk>
To: public-prov-wg@w3.org

Hi Simon,

If we agree with the definition I suggested (possible Jim's too, I am 
not sure), it shows that version (or is revision of) is not a primitive
notion in PIL, but can be derived from more primitive concepts.

I think we still need to take a view on this concept, since it is part 
of the charter,
and we can't simply ignore it.

Luc



On 06/28/2011 03:36 PM, Simon Miles wrote:
> OK, but I think that defining it generally even in a profile may go
> too far. Given that "version" means quite different things in
> different application contexts, as I think you capture by the notion
> of typed process executions in your definition, is there a value in
> defining it generally at all? I could imagine it may be defined in
> various ways in a few different domain-specific profiles, and there
> could be a mappings from the PIL model to version in DC and elsewhere
> etc., but defining it as part of the model seems to help no-one while
> adding to the complexity. This differs from time, where though it has
> different conceptions in different domains, I could imagine a default
> conception defined in a profile would be useful for applying the model
> to common kinds of web resource.
>
> Thanks,
> Simon
>
> On 28 June 2011 15:25, Myers, Jim<MYERSJ4@rpi.edu>  wrote:
>    
>> I was just trying to use version as an example of IVP in the last email, hence it shouldn't be different. Looking at whether we need version explicitly as a concept - perhaps it is a 'profile' like time...
>>
>>   Jim
>>
>>      
>>> -----Original Message-----
>>> From: public-prov-wg-request@w3.org [mailto:public-prov-wg-
>>> request@w3.org] On Behalf Of Simon Miles
>>> Sent: Tuesday, June 28, 2011 10:18 AM
>>> To: Provenance Working Group WG
>>> Subject: Re: prov-issue-11: what is version?
>>>
>>> Luc, Jim,
>>>
>>> I notice that you two take different views on what the concept "version" is
>>> intended to describe. With the example things:
>>>    T1. The government data
>>>    T2. The government data with incorrect values
>>>    T3. The government data with corrected values Under Luc's definition T3 is
>>> a version of T2, but under Jim's definition T3 is a version of T1.
>>>
>>> I'm not clear that "version", under either definition, is beneficial to keep in
>>> the model. Jim's definition seems to be only subtley if at all different from
>>> IPVT, while Luc's is distinct but just a simple composition of other concepts
>>> which could be recognised by any query.
>>>
>>> My counter-proposal would be to remove "version" from the model.
>>> Simplicity of the standard is surely a good thing where possible.
>>>
>>> If that is unacceptable, I think that Luc's definition makes sense but would
>>> be more clearly called "is revision of" or similar.
>>>
>>> Thanks,
>>> Simon
>>>
>>> On 27 June 2011 16:11, Luc Moreau<L.Moreau@ecs.soton.ac.uk>  wrote:
>>>        
>>>> Hi all,
>>>>
>>>> Exploiting the  most recent definitions of Derivation and IVP of, I
>>>> tried to propose a definition of version.
>>>> http://www.w3.org/2011/prov/wiki/ConceptVersion#Definition_by_Luc
>>>>
>>>> What do you think?
>>>> Regards,
>>>> Luc
>>>>
>>>> --
>>>> 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
>>>>
>>>>
>>>>
>>>>
>>>>          
>>> ______________________________________________________________
>>> ________
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>>> ______________________________________________________________
>>> ________
>>>        
>>>>          
>>>
>>>
>>> --
>>> Dr Simon Miles
>>> Lecturer, Department of Informatics
>>> Kings College London, WC2R 2LS, UK
>>> +44 (0)20 7848 1166
>>>        
>>
>> ______________________________________________________________________
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>>      
>
>
>    

-- 
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 Tuesday, 28 June 2011 16:30:14 GMT

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