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Re: PROV-ISSUE-40 (recommended-roles): Roles should not be SHOULD and not MUST [Conceptual Model]

From: Paul Groth <p.t.groth@vu.nl>
Date: Mon, 25 Jul 2011 11:22:25 +0200
Message-ID: <4E2D35D1.2010705@vu.nl>
To: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
CC: "public-prov-wg@w3.org" <public-prov-wg@w3.org>
It seems like unspecified is a hack to let you get around not saying a 

Again, I think I'm missing a justification of the MUST verses just 
making it a strong recommendation (i.e. SHOULD).

I think you have some inferences in mind based around roles.... but I 
think it just means that you won't be able to make those inferences if 
you don't provide roles.


Luc Moreau wrote:
> I believe there is a difference between a conceptual model and its
> encoding in
> a specific data/knowledge format.
> In my view, it is reasonable to require the presence of a role in a
> conceptual model.
> A given notation, say RDF, may provide "abbreviations", which allow for
> the role not
> to be expressed. This notation will have an explanation that absence of
> a role corresponds
> to the role  "unspecified".
> So, I believe that the conceptual model should define distinguished
> roles, e.g. unspecified.
> BTW, the file note.txt in the repository also suggested other roles
> Luc
> On 07/23/2011 03:14 PM, Provenance Working Group Issue Tracker wrote:
>> PROV-ISSUE-40 (recommended-roles): Roles should not be SHOULD and not MUST [Conceptual Model]
>> http://www.w3.org/2011/prov/track/issues/40
>> Raised by: Paul Groth
>> On product: Conceptual Model
>> Currently, roles are required for Generation, Use, and isControlledby.
>> Specifically the following sentence is given:
>> "Use, Generation, and Control assertions must contain a role."
>> It is not clear why roles must always be there. In some cases, I may not want to assert the role that something played with respect to a process.
>> Suggested resolution is to replace MUST with SHOULD.

Dr. Paul Groth (p.t.groth@vu.nl)
Assistant Professor
Knowledge Representation & Reasoning Group
Artificial Intelligence Section
Department of Computer Science
VU University Amsterdam
Received on Monday, 25 July 2011 09:25:08 UTC

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