Re: PROV-ISSUE-45: isDerivedFrom and IVPof are transitive. [Conceptual Model]

Hi Paolo and Khalid,

I think we should allow for isDerivedFrom to be inferrable.
Hence, isDerivedFrom is a construct that may be directly asserted, or 
may be inferred by
transitive closure.

Luc

On 07/25/2011 12:29 PM, Paolo Missier wrote:
> Khalid
>
> I don't think we have ever agreed on that, but I should really check 
> the voting history. The latest definition of IVP-of (or complement-of) 
> is sufficiently precise (i.e., algorithmic) that transitivity follows, 
> but derivation is purely asserted and as such there is no ground to 
> say that it is transitive -- unless we say axiomatically that it 
> should be.
>
> -Paolo
>
>> PROV-ISSUE-45: isDerivedFrom and IVPof are transitive. [Conceptual Model]
>>
>> http://www.w3.org/2011/prov/track/issues/45
>>
>> Raised by: Khalid Belhajjame
>> On product: Conceptual Model
>>
>>
>> If we agree that "isDerivedFrom" and "IVPof" are transitive, then I would suggest that this should be specified in the model working draft.
>>
>> khalid
>

-- 
Professor Luc Moreau
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University of Southampton          fax:   +44 23 8059 2865
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