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Re: PROV-ISSUE-29 (mutual-iVP-of): can two bobs be mutually "IVP of" each other [Conceptual Model]

From: Timothy Lebo <lebot@rpi.edu>
Date: Fri, 23 Mar 2012 21:19:54 -0400
Cc: Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk>, Provenance Working Group WG <public-prov-wg@w3.org>, Luc Moreau <l.moreau@ecs.soton.ac.uk>
Message-Id: <534C225C-FAD3-47DA-9790-172790C8095F@rpi.edu>
To: Jim McCusker <mccusj@rpi.edu>

On Mar 23, 2012, at 8:59 PM, Jim McCusker wrote:

> 
> On Mar 23, 2012 6:32 PM, "Stian Soiland-Reyes" <soiland-reyes@cs.manchester.ac.uk> wrote:
> >
> > On Fri, Mar 23, 2012 at 16:44, Jim McCusker <mccusj@rpi.edu> wrote:
> >
> 
> 
> > .. not sure if we should include "roles" here as it would be confusing
> > with prov:hadRole (the old EntityInRole discussion).
> 
> My intention is to use this to provide roles to entities within a particular context. We could leave this out, if it's too confusing.
> 
> 

I'd suggest dropping this from the definition and just using it in your application.

> > The current example of Bob with Facebook account is not very good. Why
> > would bobWithFacebook be an alternative of bobWithTwitter? Just
> > because they share bob as a parent specialization? Why would you form
> > such entities?
> 
> 

Because Bob exhibits different sets of behaviors in each of these environments.
He might be more casual on Facebook, but maintain a professional demeanor on Twitter. You're getting to know "two different people" (two altOf), even if they are the same person (the common specOf)

Even if you know the Bob behind Facebook, you may not know the Bob behind Twitter.

BTW, I added an example that uses alt and spec for real.
http://www.w3.org/2011/prov/wiki/Eg-19-derived-named-graph-attribution

> JimAtYale and JimAtRPI being specializations of JimMcCusker (in general) are better examples, probably.
> 
> > The BBC News home page today is a specialization of the BBC home page.
> > That could be a good one.
> >
> >
> >
> > The BBC news home page today is a specialization of the BBC news page
> > in general. BBC does not provide a URI for a given day's news page, so
> > we mint our own:
> >
> >
> > specializationOf(bbcNews2012-03-23, <http://www.bbc.co.uk/news/>)
> >
> >
> > The mobile news page is an alternative of the desktop news page. They
> > are both specialization of (here unspecified) entity.
> >
> > alternativeOf(<http://www.bbc.co.uk/news/mobile/>, <http://www.bbc.co.uk/news/>)
> 
> This is a perfect example.
> 

+10000

-Tim

> > The mobile news page of today is a specialization of the mobile news page:
> >
> > specializationOf(bbcNewsMobile2012-03-23, <http://www.bbc.co.uk/news/mobile/>)
> >
> >
> > This implies (as /news/mobile and /news/ have a common specialization):
> >
> > alternativeOf(bbcNews2012-03-23, bbcNewsMobile2012-03-23)
> 
> Yes, this all correctly follows.
> 
> Jim
> 
Received on Saturday, 24 March 2012 01:21:21 GMT

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