RE: VIAF contributor model

Unless someone objects, I would like to streamline the /#skos:Concept URI in the next VIAF release. This would affect Bernard’s example like so:

 

<http://viaf.org/viaf/102333412>  foaf:focus   <http://viaf.org/viaf/102333412/#foaf:Person>

 

The reason is that I naively reinvented chunks of SKOS/SKOSXL in the VIAF ontology and I would like to reconcile them in the next ontology like so:

 

#NameAuthorityCluster rdf:type owl:Class ;

            rdfs:subClassOf skos:Concept .

 

I’m working on a more detailed explanation as we speak. If someone feels strongly about preserving the /#skos:Concept URI form I could add an owl:sameAs to the RDF like so:

 

<http://viaf.org/viaf/102333412>  owl:sameAs   <http://viaf.org/viaf/102333412/#skos:Concept>

 

I would rather pretend it never existed, though. Any opinions on this?

 

Jeff

 

From: public-lld-request@w3.org [mailto:public-lld-request@w3.org] On Behalf Of Bernard Vatant
Sent: Tuesday, November 09, 2010 1:25 PM
To: Emmanuelle Bermes
Cc: Tillett, Barbara; public-lld
Subject: Re: VIAF contributor model

 

Hello Barbara, Emmanuelle

See on this question the foaf:focus property proposal.
http://wiki.foaf-project.org/w/term_focus

In the case proposed below, we would have for example
<http://viaf.org/viaf/102333412/#skos:Concept <http://viaf.org/viaf/102333412/#skos:Concept> >  foaf:focus   <http://viaf.org/viaf/102333412/#foaf:Person>

Best

Bernard



2010/11/4 Emmanuelle Bermes <manue.fig@gmail.com>

Barbara,

Thanks for joining the list!

Very short summary of this interesting thread: we could use SKOS
and/or SKOS-XL (SKOS for Labels, an extension of SKOS) for encoding
the part in authority data that is about Names.
We need something else for the data that is about persons and
corporate bodies as real world objects, be it FOAF, RDA, FRAD...

Which means that for the same authority record, we need to mint at
least 2 URIs, one for the "real thing" and one for the "Name" :

http://viaf.org/viaf/102333412/#foaf:Person

http://viaf.org/viaf/102333412/#skos:Concept


For more detail, you may want to read the thread in the list's archives [1].

Best regards,
Emmanuelle

[1] http://lists.w3.org/Archives/Public/public-lld/2010Oct/0107.html



On Wed, Nov 3, 2010 at 5:46 PM, Tillett, Barbara <btil@loc.gov> wrote:
> VIAF intentionally is to link the preferred forms of names for entities from around the world, so there will be several linked "preferred names" depending on the cultural environment (language/script/cataloging rules/policies) from which the contributed data comes.  Hopefully each can be clearly identified by extensions to the URIs so machines will know which to prefer/choose for display in various contexts.
>
> Is SKOS really the right way to go for names of persons or corporate bodies?  It seems strange to me, but I'm hoping to learn more from all of the conversations. (Sorry I just joined the list yesterday!) - Barbara Tillett
>
> -----Original Message-----
> From: public-lld-request@w3.org [mailto:public-lld-request@w3.org] On Behalf Of Young,Jeff (OR)
> Sent: Wednesday, November 03, 2010 10:35 AM
> To: Neubert Joachim; Antoine Isaac
> Cc: public-lld
> Subject: RE: VIAF contributor model
>
> Joachim,
>
> Unfortunately, no... At least for now.  The problem is this SKOS integrity condition on skos:prefLabel:
>
> http://www.w3.org/TR/skos-reference/#S14

>
> Because VIAF aggregates authority records from a variety of sources, there is no clear way to choose yet.
>
> Jeff
>
>> -----Original Message-----
>> From: Neubert Joachim [mailto:J.Neubert@zbw.eu]
>> Sent: Wednesday, November 03, 2010 10:26 AM
>> To: Young,Jeff (OR); Antoine Isaac
>> Cc: public-lld
>> Subject: AW: VIAF contributor model
>>
>> Hi Jeff,
>>
>> I suppose
>>
>> > <http://viaf.org/ontology/1.1/#hasEstablishedForm>
>> >     rdfs:subPropertyOf skosxl:altLabel ;
>>
>> should have been
>>
>> <http://viaf.org/ontology/1.1/#hasEstablishedForm>
>>       rdfs:subPropertyOf skosxl:prefLabel ;
>>
>> - correct?
>>
>> Cheers, Joachim
>>
>> > -----Ursprüngliche Nachricht-----
>> > Von: Young,Jeff (OR) [mailto:jyoung@oclc.org]
>> > Gesendet: Mittwoch, 3. November 2010 14:48
>> > An: Antoine Isaac
>> > Cc: Neubert Joachim; public-lld
>> > Betreff: RE: VIAF contributor model
>> >
>> > Antoine,
>> >
>> > I like your suggestion to update the current VIAF ontology with
>> > subclass/subproperty to "standard vocabularies".
>> >
>> > Here is a mockup of some triples I imagine adding to the next
>> > ontology version:
>> >
>> > <http://viaf.org/ontology/1.1/#AuthorityAgency>
>> >     rdfs:subClassOf foaf:Organization .
>> >
>> > <http://viaf.org/ontology/1.1/#NameAuthorityCluster>
>> >     rdfs:subClassOf skos:Concept .
>> >
>> > <http://viaf.org/ontology/1.1/#Heading>
>> >     rdfs:subClassOf skosxl:Label .
>> >
>> > <http://viaf.org/ontology/1.1/#hasEstablishedForm>
>> >     rdfs:subPropertyOf skosxl:altLabel ;
>> >     rdfs:domain
>> > <http://viaf.org/ontology/1.1/#NameAuthorityCluster> ;
>> >     rdfs:range http://viaf.org/ontology/1.1/#Heading .
>> >
>> > <http://viaf.org/ontology/1.1/#hasXrefAlternate>
>> >     rdfs:subPropertyOf skosxl:altLabel .
>> >     rdfs:domain
>> > <http://viaf.org/ontology/1.1/#NameAuthorityCluster> ;
>> >     rdfs:range <http://viaf.org/ontology/1.1/#Heading> .
>> >
>> > I will hold off on adding the following "contributor model"
>> > triples until later.
>> >
>> > <http://viaf.org/ontology/1.1/#NameAuthority>
>> >     rdfs:subClassOf skos:Concept .
>> >
>> > <http://viaf.org/ontology/1.1/#clusters>
>> >     rdfs:subPropertyOf skos:exactMatch .
>> >
>> > Jeff
>> >
>> > > -----Original Message-----
>> > > From: Antoine Isaac [mailto:aisaac@few.vu.nl]
>> > > Sent: Monday, November 01, 2010 12:16 PM
>> > > To: Young,Jeff (OR)
>> > > Cc: Neubert Joachim; public-lld
>> > > Subject: Re: VIAF contributor model
>> > >
>> > > Hi Jeff,
>> > >
>> > > I'm not sure that everyone agreed explicitly with the "contributor"
>> > > model. We agreed on using SKOS with other required stuff, but if
>> > > you're going to have this perspective combined with another
>> > one, maybe
>> > > we should re-visit our judgments ;-)
>> > >
>> > > In fact the present VIAF vocabulary is good in the sense
>> > that it keeps
>> > > explicit track of what VIAF does with the original data.
>> > There is this
>> > > aggregation process going on, and it may be harmful to have
>> > this mis-
>> > > represented in the data. It will be cumbersome to have the
>> > aggregated
>> > > "local" concepts and the one resulting from the aggregation
>> > together,
>> > > especially if both have the same type. Which one should a data
>> > > consumer focus on?
>> > >
>> > > I won't be too detailed here, as I don't think my understanding on
>> > > your complete new proposal is precise enough. Two general
>> > remarks, though:
>> > >
>> > > - in the Europeana Data Model [1] we use ORE proxies [2] in
>> > a way that
>> > > can deal with your aggregation problem. This is fairly cumbersome,
>> > > though. Apparently there's no free lunch on trying to solve this
>> > > :-
>> )
>> > >
>> > > - as mentioned in my previous mail, hatever be your modelling
>> > > decision, I'd favour an approach to vocabulary
>> > interoperability that
>> > > relies on explicit subclass/subproperty (or equivalent
>> > class/property)
>> > > axioms to standard vocabularies. Directly letting your current
>> > > VIAF constructs "go away" (if I understand well that expression)
>> > > seems dangerous, as it hides the original rationale of the data.
>> > > Linking back to our application profiles discussion last week,
>> > > keeping explicit your positioning VIAF as an AP of
>> > SKOS/FOAF/whatwever seems
>> > > good :-)
>> > >
>> > > Cheers,
>> > >
>> > > Antoine
>> > >
>> > > [1] http://version1.europeana.eu/web/europeana-

>> > > project/technicaldocuments/, see "EDM Data Model Primer"
>> > > [2] http://www.openarchives.org/ore/1.0/datamodel#Proxies

>> > >
>> > > > I’m happy to hear so much agreement on the VIAF contributor
>> model.
>> > > Given this, I would like to propose a VIAF aggregation model to go
>> > > with it.
>> > > >
>> > > > To recap the contributor model, VIAF would mint a
>> > skos:ConceptScheme
>> > > URI for each “source” and a skos:Concept for each
>> > contributed “record”.
>> > > This would help us clarify the
>> > > http://viaf.org/ontology/1.1/#AuthorityAgency class and do
>> > away with
>> > > http://viaf.org/ontology/1.1/#NameAuthority (which are effectively
>> > > contributed skos:Concepts). If the source already conforms to the
>> > > “contributor model”, then VIAF can reuse their
>> > skos:ConceptScheme and
>> > > skos:Concept identifiers.
>> > > >
>> > > > IMO, VIAF itself should be remodeled as a skos:ConceptScheme
>> > > something like this:
>> > > >
>> > > > <http://viaf.org/ontology/1.2/#skos:ConceptScheme>
>> > > >
>> > > >                  rdf:type skos:ConceptScheme .
>> > > >
>> > > > This would allow us to do away with
>> > > http://viaf.org/ontology/1.1/#NameAuthorityCluster (which are
>> > > effectively VIAF skos:Concepts). For example:
>> > > >
>> > > > <http://viaf.org/viaf/108389263/#skos:Concept>
>> > > >
>> > > >                  rdf:type skos:Concept ;
>> > > >
>> > > >                  skos:inScheme
>> > > <http://viaf.org/ontology/1.2/#skos:ConceptScheme>.
>> > > >
>> > > > As mentioned, this would allow contributed and VIAF
>> > skos:Concepts to
>> > > be related (clustered) using skos:exactMatch in a hub and spoke
>> > > pattern.
>> > > >
>> > > > In the “contributor model”, ConceptSchemes should be free
>> > to choose
>> > > SKOS or SKOSXL prefLabel/altLabel, but VIAF will probably
>> > use SKOSXL
>> > > exclusively to encourage reconciliation with the FRSAD model. The
>> > > http://viaf.org/ontology/1.1/#Heading and its subclasses
>> > could then go
>> > > away in favor of skosxl:Label. If necessary, VIAF could
>> > produce both
>> > > literal and object labels, but it would be nice if we could
>> > avoid this
>> > > duplication.
>> > > >
>> > > > Regarding FRSAD, we need to beware that skos:inScheme is
>> typically
>> > > attached to skos:Concept whereas FRSAD wants to attach it to the
>> > > skosxl:Label. SKOS doesn’t specify a domain for skos:inScheme, so
>> > > should we discuss the need/possibility of doing both?
>> > > >
>> > > > Also note that VIAF depends on its contributors for
>> skosxl:Labels.
>> > > Although the contributed skos:Concept spokes are expected to have
>> > > a prefLabel, the VIAF skos:Concept hub currently has no mechanism
>> > > for choosing a preference. This presumably means that all
>> > > concept/label connections at the hub level will be skosxl:altLabel
>> > > in the next release. We tried to solve this in version 1.1 using
>> > > custom properties, but I’m skeptical this is the correct path.
>> > Consequently,
>> > > they will probably be abandoned rather than updated in the
>> > next release:
>> > > >
>> > > > http://viaf.org/ontology/1.1/#hasEstablishedForm

>> > > >
>> > > > http://viaf.org/ontology/1.1/#hasXrefAlternate
>> > > >
>> > > > Jeff
>> > > >
>> > > > *From:* Neubert Joachim [mailto:J.Neubert@zbw.eu]
>> > > > *Sent:* Friday, October 29, 2010 5:47 AM
>> > > > *To:* Young,Jeff (OR); public-lld
>> > > > *Subject:* AW: VIAF contributor model
>> > > >
>> > > > Hi Jeff,
>> > > >
>> > > > +1 for your approach using skos:Concept.
>> > > >
>> > > > One key advantage I see in this is that it can be adapted and
>> used
>> > > easily inside and outside the library world, with standard
>> > tools which
>> > > support homegrown keyword lists or open or custom taxonomies of
>> > > any kind. An important area for such tools are autosuggest
>> > > services for keyword selection, hinting from skos:altLabel to
>> > skos:prefLabel, with
>> > > support for skos:hiddenLabel if necessary (you can find an example
>> > > implementation of such a service at http://zbw.eu/beta/stw-

>> > > ws/examples/suggest.html).
>> > > >
>> > > > I'd also suggest to add a skos:prefLabel to every VIAF cluster.
>> > > skos:prefLabel is meant to "unambiguously represent this concept
>> > > within a KOS and its applications" (SKOS Primer). Especially in
>> > > the case personal names, this encourages building unique literals
>> > > like "Chen, Li, 1954-" (different from "Chen, Li, 1810-1882") in
>> > > VIAF or "Müller, E. 19..-.... traducteur" in BNF or "Schmidt,
>> > > Hans
>> > (Musiker)" in GND.
>> > > >
>> > > > If I got it right, you already did a lot of
>> > disambiguation for your
>> > > viaf:Headings. Adding a skos:prefLabel to every VIAF cluster would
>> > > express clear commitment to strive for uniqueness and also
>> > allow easy
>> > > reuse by tools (where skosxl:Label properties are
>> > significantly more
>> > > difficult to handle), and thus could be tremendously useful.
>> > > >
>> > > > Cheers, Joachim
>> > > >
>> > > >
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>> > > --
>> > > >
>> > > > *Von:* public-lld-request@w3.org
>> > [mailto:public-lld-request@w3.org]
>> > > *Im Auftrag von *Young,Jeff (OR)
>> > > > *Gesendet:* Donnerstag, 28. Oktober 2010 23:21
>> > > > *An:* public-lld
>> > > > *Betreff:* VIAF contributor model
>> > > >
>> > > >     The VIAF RDF is badly in need of an update. For example,
>> > > > VIAF has
>> > > a bad habit of assuming that “clusters” automatically map
>> > to “Person”.
>> > > Upgrading it to recognize the reality of “Organization” and
>> > perhaps a
>> > > few others shouldn’t be too hard, but there are other issues worth
>> > > considering.
>> > > >
>> > > >     After closer inspection, it looks like the VIAF ontology
>> > > <http://viaf.org/ontology/1.1/> reinvents some key aspects
>> > of SKOS. It
>> > > would be nice to start factoring out these misalignments ASAP.
>> > > This group’s input on the possibilities would be greatly appreciated.
>> > > >
>> > > >     Background: VIAF started out using foaf:Person for its “real
>> > > world objects”, switched to skos:Concept, and was starting
>> > to wobble
>> > > back to foaf:Person. At that point, the decision was made
>> > to identify
>> > > both for the sake of argument:
>> > > >
>> > > >     http://viaf.org/viaf/102333412/#foaf:Person

>> > > >
>> > > >     http://viaf.org/viaf/102333412/#skos:Concept
>> > > >
>> > > >     It was far from clear at the time whether both made sense,
>> > > separate identity was necessary, or what property should be used
>> > > to connect them.
>> > > >
>> > > >     At the F2F, Martin Malmsten (who is involved with
>> > contributions
>> > > to VIAF via SELIBR) pointed out the new foaf:focus element
>> > that seems
>> > > to do a very good job of rationalizing for the connection.
>> > > >
>> > > >     http://xmlns.com/foaf/spec/#term_focus

>> > > >
>> > > >     Like VIAF, SELIBR also coins URIs for foaf:Person and
>> > > skos:Concept and this seems like a good model for other
>> > contributors
>> > > and VIAF itself to follow.
>> > > >
>> > > >     I’m also inclined to believe that skos:ConceptScheme should
>> be
>> > > used to differentiate different “sources” in VIAF. This could and
>> > > probably should be done regardless of whether the contributors
>> > > understand or publish SKOS themselves. The attached UML is
>> > intended to
>> > > show how this could be conceptualized. This presumably
>> > requires some
>> > > explanation, but hopefully a picture is worth a thousand words.
>> > > >
>> > > >     I’m also pretty convinced that the
>> > > http://viaf.org/ontology/1.1/#Heading class needs to be bound to
>> > > skosxl:Label class in some way (rdfs:subClassOf?). I don’t think
>> > > it can completely go away, though, because of inconvenient
>> > restrictions
>> > > on the skosxsl:prefLabel and skosxl:altLabel.
>> > > >
>> > > >     Thoughts or questions?
>> > > >
>> > > >     Jeff
>> > > >
>> > > >     ---
>> > > >
>> > > >     Jeffrey A. Young
>> > > >     Software Architect
>> > > >     OCLC Research, Mail Code 410
>> > > >     OCLC Online Computer Library Center, Inc.
>> > > >     6565 Kilgour Place
>> > > >     Dublin, OH 43017-3395
>> > > >     www.oclc.org <http://www.oclc.org>
>> > > >
>> > > >     Voice: 614-764-4342
>> > > >     Voice: 800-848-5878, ext. 4342
>> > > >     Fax: 614-718-7477
>> > > >     Email: jyoung@oclc.org <mailto:jyoung@oclc.org>
>> > > >
>> > >
>> >
>> >
>




-- 
Bernard Vatant
Senior Consultant
Vocabulary & Data Engineering
Tel:       +33 (0) 971 488 459
Mail:     bernard.vatant@mondeca.com
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