Re: R: UNESKOS Vocabulary and 2nd SKOS version of UNESCO Thesaurus

Hi Juan!

My first reaction was the same as Armando's 2nd point, i.e. some of your 
extensions (namely unesco:contains and unesco:memberOf) are extensions 
of core SKOS with no inherent relationship to the UNESCO Thesaurus.

There are certainly arguments about whether properties should be defined 
in both directions or not. In this case SKOS has decided to make only 
one way relationships (at least in these two cases, skos:inScheme and 
skos:member) and you now want to change that by introducing the inverse 
properties as well. You can certainly do that for your own thesaurus but 
I think that sticking to the SKOS properties would be simpler for 
everyone. In SPARQL and most RDF toolkits it is not very difficult to 
follow property paths in either direction.

-Osma



On 16/09/15 11:57, Armando Stellato wrote:
> Dear Juan,
>
> just a couple of notes.
>
> 1.Why the word “main” adopted in some property names? I don’t find any
> rationale for the use of “main” as the concepts do not seem to be “main”
> at all for the related schemes/collections.
>
> 2.Some properties, more than being targeted at a special domain (e.g.
> UNESCO), seems plain extensions of the core SKOS, aiming at filling some
> gaps left by it. However in some cases I feel like these gaps were left
> by purpose. E.g. the uneskos:contains provides an inverse property for
> skos:inScheme. Think about a 30.000 concepts thesaurus (for which there
> exists at least a scheme containing all concepts). If you were using the
> UNESKOS vocabulary, you surely would try a SPARQL DESCRIBE on this main
> scheme? ;-)
>
> a.Use of SPARQL (or -1 expressions in DL) does not strictly require for
> the presence of named inverse properties for everything. So, why do they
> exist? Because when you get the description (for example by a DESCRIBE,
> but not limited to that) of a resource, they can provide nice “resumes”
> for it. The kind of path you want to realize (see the description of
> hasMainConcept) can be performed without the strict need of the
> property. It is up to SKOS browsing tools to allow for that
> visualization/traversal options.
>
> Just my two cents on that,
>
> Best regards,
>
> Armando
>
> *Da:*Juan Antonio Pastor Sánchez [mailto:pastor@um.es]
> *Inviato:* mercoledì 16 settembre 2015 02:21
> *A:* public-esw-thes@w3.org
> *Oggetto:* UNESKOS Vocabulary and 2nd SKOS version of UNESCO Thesaurus
>
> Dear all,
>
> I want to communicate the publication Vocabulary UNESKOS that
> complements certain aspects of SKOS [1] and ISO-THES [2]. This
> vocabulary is designed in the context of the proposed UNESKOS, more
> specifically for the SKOS representation of the UNESCO Thesaurus.
>
> The document describing the vocabulary is available at:
>
>   * http://skos.um.es/TR/uneskos
>
> The RDF vocabulary is available for download and use from the UNESKOS
> namespace:
>
>   * http://purl.org/umu/uneskos# <http://purl.org/umu/uneskos>
>
> Likewise, the 2nd SKOS version of the UNESCO Thesaurus is available at:
>
>   * http://skos.um.es/unescothes
>
> Includes following features:
>
>   * Persistent and Dereferenceable URIs.
>   * Turtle and RDF/XML Datasets avalaible for download.
>   * RDFa markup.
>   * SPARQL Endpoint.
>   * Content negotiation avalaible in N3, JSON-LD, etc...
>
> This second version makes use of SKOS, ISO-THES and UNESKOS. Along the
> coming weeks new features navigation within the HTML version will be added.
>
> Please, for any suggestion or correction you can contact me.
>
> Best regards,
>
> Juan
>
> --
>
> Juan Antonio Pastor Sánchez, Ph.D.
> Dep. of Information and Documentation
> Faculty of Communication and Documentation
> University of Murcia
> phone: +34 868 88 7252
> http://webs.um.es/pastor
> pastor@um.es <mailto:pastor@um.es>
>


-- 
Osma Suominen
D.Sc. (Tech), Information Systems Specialist
National Library of Finland
P.O. Box 26 (Kaikukatu 4)
00014 HELSINGIN YLIOPISTO
Tel. +358 50 3199529
osma.suominen@helsinki.fi
http://www.nationallibrary.fi

Received on Wednesday, 16 September 2015 11:36:52 UTC