Re: SKOS Instance V Classes

Interesting, thanks for the pointer!

   - SKOS concepts are OWL individuals;
   - SKOS does not take a stance on whether it must also be possible to
   treat SKOS concepts as OWL classes;
   - The restrictions on OWL-DL prevent treating SKOS concepts as OWL
   classes;
   - *There is an expectation that an ongoing OWL revision will alleviate
   the latter problem by offering some form of metamodeling*

Does anyone have knowledge about the expected OWL revision?

Kind Regards
Helmut

Helmut Nagy

COO, Strategic Product Manager

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On Tue, Jan 30, 2024 at 12:51 PM Manolis Peponakis <
manolis.peponakis@gmail.com> wrote:

> Dear Helmut and all
>
> Maybe it's my fault but I think there is a misunderstanding. The notion of
> skos:Concept is an owl:Class but each skos:Concept (i.e. the education, the
> trains, etc) is an OWL instance. And in OWL-DL the sets of classes and
> instances are disjoint.
>
> Documentation -and some solutions on implementing OWL classes in SKOS-
> could be found on section “5.2 SKOS Concepts and OWL Classes” of the SKOS
> Primer available at https://www.w3.org/TR/skos-primer/#secskosowl
>
> Kind Regards
>
> Manolis
>
> On Tue, 30 Jan 2024 at 11:28, Helmut Nagy <helmut.nagy@semantic-web.com>
> wrote:
>
>> Hello Renato,
>>
>> according to the SKOS:
>> http://www.w3.org/TR/skos-reference/skos.rdf
>>
>> A skos:Concept is a owl:Class
>>
>> <rdf:Description rdf:about="#Concept">
>> <rdfs:label xml:lang="en">Concept</rdfs:label>
>> <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2004/02/skos/core"/>
>> <skos:definition xml:lang="en">An idea or notion; a unit of
>> thought.</skos:definition>
>> <!-- S1 -->
>> <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
>> </rdf:Description>
>>
>> Verstehe ich etwas falsch? Das sollte doch die Frage klären.
>>
>> Kind Regards
>> Helmut
>>
>> Helmut Nagy
>>
>> COO, Strategic Product Manager
>>
>> [image:
>> https://mailtasticcdn.azureedge.net/img/images/siglinks/company/02438aa4-230f-43f1-af08-455e9aa5a989/u_logo-OtFrszV7rQ.png]
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>>
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>>
>> On Mon, Jan 29, 2024 at 5:13 AM Renato Iannella <r@iannel.la> wrote:
>>
>>> Hi all, I have a question (that I hope you have not covered before …if
>>> so…please send the archive links…)
>>>
>>> Having developed a number of SKOS vocabs over the years (across
>>> different domains) I am constantly faced with the challenge of developing a
>>> “vocabulary” that supports both the SKOS model (ie terms are instances of
>>> skos:Concept) and terms that are also owl:Classes - to enable standard
>>> inferencing.
>>>
>>> Here is a simple example:
>>>
>>> vocab:SmokingVariety a skos:ConceptScheme, owl:Class ;
>>>             rdfs:subClassOf vocab:Vocabulary ;
>>>             skos:prefLabel "Smoking Variety"@en-uk .
>>>
>>> vocab:cigarette a skos:Concept, owl:Class ;
>>>             skos:prefLabel "Cigarette"@en-uk ;
>>>             skos:definition "Processed tobacco, manufactured into
>>> cylinder made of paper."@en-uk ;
>>>             rdfs:subClassOf vocab:SmokingVariety ;
>>>             skos:topConceptOf vocab:SmokingVariety .
>>>
>>>
>>> Are there any best-practices in this context?
>>>
>>> Thanks…
>>>
>>> Renato
>>>
>>>
>>>
>>>