W3C home > Mailing lists > Public > public-prov-wg@w3.org > June 2012

Re: ISSUE-385: hasProvenanceIn: finding a solution

From: Graham Klyne <GK@ninebynine.org>
Date: Fri, 08 Jun 2012 15:29:14 +0100
Message-ID: <4FD20C3A.4060908@ninebynine.org>
To: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
CC: Timothy Lebo <lebot@rpi.edu>, Paul Groth <p.t.groth@vu.nl>, W3C provenance WG <public-prov-wg@w3.org>
On 06/06/2012 14:48, Luc Moreau wrote:
> Hi Tim,
> If they go in prov-o, then we also want them in prov-dm, prov-xml, etc
> Luc

I think that's non sequitur.

#g
--

> On 06/06/2012 02:18 PM, Timothy Lebo wrote:
>> So, Luc and PAQ'ers:
>>
>> Are we covered, if PROV-O had the 5 PAQ terms?
>>
>> -Tim
>>
>> On Jun 6, 2012, at 6:47 AM, Paul Groth wrote:
>>
>>> Hi Luc,
>>>
>>> I would say that this attributes should not be a part of the dm. If
>>> they are defined, these should be part of the paq. This not mean that
>>> should not be possible to include as attributes on bundles.
>>>
>>> I think the key is to identify the bundle not necessarily convey how
>>> to obtain it.
>>>
>>> Thanks
>>> Paul
>>>
>>> On Wed, Jun 6, 2012 at 12:12 PM, Luc Moreau<L.Moreau@ecs.soton.ac.uk> wrote:
>>>> Hi Tim,
>>>>
>>>> The last point now is that in the original proposal, we
>>>> had some optional attributes prov:service-uri and prov:provenance-uri.
>>>>
>>>> So, two questions:
>>>>
>>>> 1. Do we define these as part of the prov-dm/prov-o?
>>>>
>>>> 2. Can they be defined as optional attributes of bundles?
>>>>
>>>> Cheers,
>>>> Luc
>>>>
>>>>
>>>> On 06/06/2012 11:10 AM, Luc Moreau wrote:
>>>>
>>>> Hi Tim,
>>>>
>>>> See below.
>>>>
>>>> On 06/05/2012 11:26 PM, Timothy Lebo wrote:
>>>>
>>>> Overall, looks pretty good.
>>>>
>>>>
>>>>
>>>> Great, it looks like we are converging.
>>>>
>>>>
>>>>
>>>> "sharing the facets"
>>>> ->
>>>> perhaps use "presenting aspects" as with the accepted phrasing from the last
>>>> round of alt/spec definitions?
>>>>
>>>>
>>>> Yes,
>>>>
>>>>
>>>> BTW, you still have a missing 0 in:
>>>>
>>>> 2011-11-16T16:00:00,2011-11-16T17:0:00
>>>>
>>>>
>>>>
>>>> fixed
>>>>
>>>>
>>>> "A new agent tool:Bob1 is declared as a restriction of ex:Bob"
>>>> -> ?
>>>> "A new agent tool:Bob1 is declared as a specialization of ex:Bob"
>>>>
>>>>
>>>> I used contextualization to avoid confusion with the specializationOf
>>>> relation.
>>>>
>>>>
>>>>
>>>> "defines two specializations of these contextualized agents with associated
>>>> rating"
>>>> -> (nit)
>>>> "defines two specializations of these contextualized agents with an
>>>> associated rating"
>>>>
>>>>
>>>> "bade" -> "bad"
>>>>
>>>>
>>>> Fixed.
>>>>
>>>>
>>>>
>>>>
>>>> I'm finally comfortable with your modeling of the visualization scenario.
>>>>
>>>>
>>>>
>>>> Great.
>>>> Question: in the second example, is it appropriate to write
>>>>
>>>> entity(tool:report1, [viz:color="orange"]) // is it appropriate to
>>>> add viz attributes to tool:report1 or should we specialize it?
>>>>
>>>>
>>>> or should we have two separate entities
>>>>
>>>>
>>>> entity(tool:report1)
>>>> entity(tool:specializedReport1, [viz:color="orange"])
>>>> specializationOf(tool:specializedReport1, tool:report1)
>>>>
>>>>
>>>> Luc
>>>>
>>>> -Tim
>>>>
>>>>
>>>>
>>>> On Jun 5, 2012, at 4:03 PM, Luc Moreau wrote:
>>>>
>>>> Hi Tim,
>>>>
>>>> I tried to write this up as a separate relation contextualizationOf, see
>>>> section 1.3 in [1].
>>>> I believe this relation is compatible with your rdf encoding. The only
>>>> difference, here,
>>>> is that we make this an identifiable thing.
>>>>
>>>> [
>>>> a prov:Entity; prov:ContextualizedEntity;
>>>> prov:identifier ex:Bob;
>>>> prov:inContext ex:run2;
>>>> ];
>>>>
>>>> What do you think?
>>>> Luc
>>>>
>>>> [1]
>>>> http://dvcs.w3.org/hg/prov/raw-file/default/model/working-copy/wd6-contextualization.html
>>>>
>>>>
>>>> On 04/06/2012 23:25, Timothy Lebo wrote:
>>>>
>>>> Luc,
>>>>
>>>> (bottom)
>>>>
>>>> On Jun 4, 2012, at 5:31 PM, Luc Moreau wrote:
>>>>
>>>> Hi Tim,
>>>>
>>>> Some comments/questions below.
>>>>
>>>> On 04/06/2012 13:46, Timothy Lebo wrote:
>>>>
>>>> Luc,
>>>>
>>>> On Jun 4, 2012, at 5:16 AM, Luc Moreau wrote:
>>>>
>>>> Hi all,
>>>>
>>>> During this diamond jubilee WE, I had the opportunity to think about Tim and
>>>> Simon's long emails.
>>>>
>>>> I agree with them that we have concepts of alternate and specialisation, and
>>>> we want to reuse them.
>>>>
>>>> I also came to the conclusion that behind the hasProvenanceIn relation, what
>>>> I really wanted was a form of alternate. But not what Tim or Simon are
>>>> suggesting.
>>>>
>>>> The PROV data model has a shortcoming: the inability to identify something
>>>> in some context. That's what I am trying to address here.
>>>>
>>>>
>>>>
>>>> 
>>>>
>>>>
>>>>
>>>> The interpretation of
>>>> alternate(tool:Bob2, ex:Bob,ex:run2)
>>>> is that tool:Bob2 is the entity that share aspects of ex:bob as described by
>>>> ex:run2. Conceptually, this could be done by substituting ex:Bob for
>>>> tool:Bob2 in ex:run2.
>>>>
>>>> I appreciate that what I am describing here is not too distant from
>>>> http://www.w3.org/TR/2011/WD-prov-dm-20111215/#record-complement-of, which
>>>> had optional account, and was not received with enthusiasm, to say the
>>>> least.
>>>>
>>>> Coincidentally, Paul shared this paper
>>>> http://ceur-ws.org/Vol-614/owled2010_submission_29.pdf which introduces
>>>> rules of the kind
>>>> X counts as Y in context C
>>>> which bears some resemblance with what I am trying to argue for.
>>>>
>>>> So, my proposal is;
>>>> - drop hasProvenanceIn
>>>> - drop isTopicIn
>>>> - allow for the ternary form of alternate
>>>>
>>>> Tim and Simon approach by using two binary relations do not offer the same
>>>> level of expressivity.
>>>> The also have a technological bias, as well: they require querying/reasoning
>>>> facility. Therefore,
>>>> their suggestion is not suitable for a data model supposed to be technology
>>>> neutral.
>>>>
>>>>
>>>>
>>>> A stab at:
>>>>
>>>> bundle tool:analysis01
>>>> alternate(tool:Bob2, ex:Bob,ex:run2)
>>>> endBundle
>>>>
>>>> in PROV-O:
>>>>
>>>> tool:analysis01 {
>>>> tool:Bob2
>>>> prov:alternateOf [ ## The use here of bnode is, for once, actually
>>>> appropriate :-)
>>>> a prov:Entity; prov:ContextualizedEntity;
>>>> prov:identifier ex:Bob; ## The identifier that is used
>>>> "over there" Can't use dcterms:identifier b/c that is a rdfs:Literal.
>>>> prov:inContext ex:run2; ## "over there" Could
>>>> prov:atLocation be reused?
>>>> ];
>>>> }
>>>>
>>>>
>>>> Thanks for this, Tim.
>>>>
>>>> First some questions:
>>>> - why a bnode here?
>>>>
>>>>
>>>> bnodes are read "the thing that" and _can_ serve as an existential.
>>>>
>>>> - Can you explain the dcterms:identifier comment?
>>>>
>>>>
>>>> 1) The value is the identifier used in the other bundle.
>>>> 2) The rdfs:range of dcterms:identifier is a literal "http://foo.com", but
>>>> it is more useful if it is a rdfs:Resource<http://foo.com>. With the
>>>> former, we know that we can "try to go there" to dereference the URI.
>>>>
>>>>
>>>> Now, assuming that this rdf encoding expresses what was originally
>>>> suggested, some further questions:
>>>> - have we got indeed a ternary alternateOf relation in prov-dm as I
>>>> suggested?
>>>>
>>>>
>>>> Perhaps. The original binary that we now know and love, and a second ternary
>>>> that "wraps" a URI and a Bundle (that mentions the URI).
>>>> The only new things would be:
>>>>
>>>> 1) The two new predicates prov:identifier and prov:inContext (perhaps that
>>>> should just be called prov:inBundle -- I was swayed too far towards DCTerms
>>>> when I chose that this morning).
>>>> 2) The new rule to unwrap your ternary DM into this RDF structure.
>>>>
>>>>
>>>> - or have we got some form of ternary relation
>>>> isContextualizationOf(e2,e1,bundle)?
>>>>
>>>>
>>>> Or, just a binary isContextualized(e1,bundle)?
>>>>
>>>> And we just stack on an existing alternateOf(e2,e1)...
>>>>
>>>>
>>>> BTW, not really sure where we're going with this.
>>>> It feels like we're close to wrapping this up, but worried that we're in
>>>> some odd local minima.
>>>>
>>>> Regards,
>>>> Tim
>>>>
>>>>
>>>>
>>>> Thanks,
>>>> 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
>>>>
>>>>
>>>>
>>>> --
>>>> 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
>>>
>>>
>>> --
>>> --
>>> Dr. Paul Groth (p.t.groth@vu.nl)
>>> http://www.few.vu.nl/~pgroth/
>>> Assistant Professor
>>> Knowledge Representation& Reasoning Group
>>> Artificial Intelligence Section
>>> Department of Computer Science
>>> VU University Amsterdam
>>>
>>>
>
Received on Friday, 8 June 2012 20:40:00 UTC

This archive was generated by hypermail 2.3.1 : Tuesday, 6 January 2015 21:58:16 UTC