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Re: PROV-ISSUE-125: derivation-attributes constraint (PROV-DM and PROV-O) [Data Model]

From: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
Date: Wed, 11 Jan 2012 23:17:51 +0000
Message-ID: <EMEW3|5f8c68f19d8dd96127595473750c5bc5o0ANJA08L.Moreau|ecs.soton.ac.uk|4F0E189F.5050803@ecs.soton.ac.uk>
To: Satya Sahoo <satya.sahoo@case.edu>
CC: public-prov-wg@w3.org
Thanks Satya.
Luc

On 11/01/12 23:06, Satya Sahoo wrote:
> Hi Luc,
> Since the issues raised in this thread have been superseded with 
> updates in DM, I am comfortable with closing this issue.
>
> Thanks.
>
> Best,
> Satya
>
> On Wed, Nov 30, 2011 at 7:22 AM, Luc Moreau <L.Moreau@ecs.soton.ac.uk 
> <mailto:L.Moreau@ecs.soton.ac.uk>> wrote:
>
>     Hi Satya,
>     Can you please confirm we can close this issue? (at least, for the
>     dm part)
>     Best regards,
>     Luc
>
>
>     On 11/07/2011 12:51 PM, Luc Moreau wrote:
>
>         Hi Satya,
>
>         Responses interleaved.
>
>         On 10/15/2011 11:48 PM, Provenance Working Group Issue Tracker
>         wrote:
>
>             PROV-ISSUE-125: derivation-attributes constraint (PROV-DM
>             and PROV-O) [Data Model]
>
>             http://www.w3.org/2011/prov/track/issues/125
>
>             Raised by: Satya Sahoo
>             On product: Data Model
>
>             The following constraint (id=derivation-attributes) is
>             defined for wasDerivedFrom Relation (in mercurial fpwd
>             head PROV-DM document on Oct 15, 2011):
>
>             "Given a process execution expression denoted by pe,
>             entity expressions denoted by e1 and e2, qualifiers q1 and
>             q2, the assertion wasDerivedFrom(e2,e1,pe,q2,q1) or
>             wasDerivedFrom(e2,e1) holds if and only if the values of
>             some attributes of the entity expression identified by e2
>             are partly or fully determined by the values of some
>             attributes of the entity expression identified by e1."
>
>             Issue:
>             a) This attribute-based constraint for wasDerivedFrom
>             property can lead to ambiguous assertions of
>             wasDerivedFrom between Entity instances.
>
>             Example scenario: The color attribute of an apple, kept in
>             a refrigerator, "color = brown" is determined by the
>             attribute of the refrigerator "temperature = -10C". Can we
>             assert that "brown apple" wasDerivedFrom "refrigerator"?
>
>             We can argue that the "brown apple" dependedOn
>             "refrigerator" with temperature setting of -10C, but not
>             wasDerivedFrom
>
>             Suggestion: restate the above attribute-based constraint
>             for "dependedOn" relation instead of "wasDerivedFrom"
>
>
>         The WG agreed that this constraint should be dropped.
>
>             b) Since dependedOn is a weaker notion of wasDerivedFrom -
>             we can assert in the PROV-O that dependedOn is a parent
>             property (more generic version) of wasDerivedFrom
>
>
>         That's a prov-o specific comment.
>         You need to be careful about transitivity. One is, the other
>         is not, i believe.
>
>             c) Suggest renaming dependedOn to dependentOn
>
>
>         It's nice to be able to keep the verbal form, similarly to the
>         other relations, with past explicit.
>
>         I feel we can close this issue. Let me know if otherwise.
>
>         Cheers,
>         Luc
>
>
>     -- 
>     Professor Luc Moreau
>     Electronics and Computer Science   tel: +44 23 8059 4487
>     <tel:%2B44%2023%208059%204487>
>     University of Southampton          fax: +44 23 8059 2865
>     <tel:%2B44%2023%208059%202865>
>     Southampton SO17 1BJ               email: l.moreau@ecs.soton.ac.uk
>     <mailto:l.moreau@ecs.soton.ac.uk>
>     United Kingdom http://www.ecs.soton.ac.uk/~lavm
>     <http://www.ecs.soton.ac.uk/%7Elavm>
>
>
>
Received on Wednesday, 11 January 2012 23:22:03 UTC

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