OWL subclass defined in turtle

Question

I try to add a bit of ontology to a (public) RDF dataset (wordnet), specifically I need to differentiate between LexicalEntries for Verbs and Nouns, separated as two subclasses. Following examples on the web and in the OWL standard, I assumed that

:LexicalEntryNoun a owl:Class ;
  rdfs:subClassOf
    [ a owl:Restriction ;
      owl:onProperty wn:part_of_speech ;
      owl:hasValue wn:noun
    ] .

should build a class LexicalEntryNoun , but the query (in jena fuseki)

prefix  :  <http://gerastree.at/2017/litonto#> 
   SELECT *  
WHERE { 
   ?s a  :LexicalEntryNoun.
 } 

gives an empty result. The two URI which should be returned are included in the class represented by a blank node, which stands for the restriction, but are not reported as LexicalEntryNoun as reported in other queries.

i am new to OWL and do not find many examples of OWL in turtle syntax. Where is my error? Thank you for help!

I constructed a very small subset of data which is loaded together with the OWL reasoner http://jena.hpl.hp.com/2003/OWLFBRuleReasoner :

@prefix wn31:  <http://wordnet-rdf.princeton.edu/wn31> .
@prefix lemon: <http://lemon-model.net/lemon#> .
@prefix nlp:   <http://gerastree.at/nlp_2015#> .
@prefix rdf:   <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix lit:   <http://gerastree.at/lit_2014#> .
@prefix wn:    <http://wordnet-rdf.princeton.edu/ontology#> .
@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .
@prefix ns:   <http://www.example.org/ns#> .
@prefix owl:  <http://www.w3.org/2002/07/owl#> .
@prefix xsd:  <http://www.w3.org/2001/XMLSchema#> .
@prefix  :  <http://gerastree.at/2017/litonto#> .

<http://wordnet-rdf.princeton.edu/wn31/%27s+Gravenhage-n>
        a                    _:b0 , owl:Thing , rdfs:Resource , lemon:LexicalEntry ;
        lemon:canonicalForm  <http://wordnet-rdf.princeton.edu/wn31/%27s+Gravenhage-n#CanonicalForm> ;
        lemon:sense          <http://www.lexvo.org/page/wordnet/30/noun/%27s_gravenhage_1_15_00> , <http://wordnet-rdf.princeton.edu/wn31/%27s+Gravenhage-n#1-n> ;
        wn:part_of_speech    wn:noun ;
        owl:sameAs           <http://wordnet-rdf.princeton.edu/wn31/%27s+Gravenhage-n> .

<http://wordnet-rdf.princeton.edu/wn31/%27hood-n>
        a                    _:b0 , owl:Thing , rdfs:Resource , lemon:LexicalEntry ;
        lemon:canonicalForm  <http://wordnet-rdf.princeton.edu/wn31/%27hood-n#CanonicalForm> ;
        lemon:sense          <http://www.lexvo.org/page/wordnet/30/noun/%27hood_1_15_00> , <http://wordnet-rdf.princeton.edu/wn31/%27hood-n#1-n> ;
        wn:part_of_speech    wn:noun ;
        owl:sameAs           <http://wordnet-rdf.princeton.edu/wn31/%27hood-n> .

:LexicalEntryNoun a owl:Class ;
  rdfs:subClassOf
    [ a owl:Restriction ;
      owl:onProperty wn:part_of_speech ;
      owl:hasValue wn:noun
    ] .

Answer 1

as already posted on the Apache Jena Users mailing list, the answer is:

Change the subclassof to an equivalence. Since both resources:

http://wordnet-rdf.princeton.edu/wn31/%27s+Gravenhage-n

http://wordnet-rdf.princeton.edu/wn31/%27hood-n

would fall inside the :LexicalEntryNoun class and show up in his SPARQL query.

Regards, Barry