Re: [OWLAPI-developer] Modify equivalent class and/or make a defined class

[Ignazio P. <ign...@ya...>]

2010/9/27 Matteo Danieletto <mat...@gm...>:
> Hi everybody,
> I have a little issue. I want change the value in a definition of class.
>
> <owl:Class rdf:about="#TemperatureTooWarm">
>         <owl:equivalentClass rdf:resource="#TooWarm"/>
>         <owl:equivalentClass>
>             <owl:Class>
>                 <owl:intersectionOf rdf:parseType="Collection">
>                     <rdf:Description rdf:about="#Temperature"/>
>                     <owl:Restriction>
>                         <owl:onProperty
> rdf:resource="#hasFeatureTemperature"/>
>                         <owl:someValuesFrom>
>                             <rdf:Description>
>                                 <rdf:type rdf:resource="&rdfs;Datatype"/>
>                                 <owl:onDatatype rdf:resource="&xsd;float"/>
>                                 <owl:withRestrictions
> rdf:parseType="Collection">
>                                     <rdf:Description>
>                                         <xsd:minInclusive
> rdf:datatype="&xsd;float">35</xsd:minInclusive> ############ THIS VALUE
>                                     </rdf:Description>
>                                 </owl:withRestrictions>
>                             </rdf:Description>
>                         </owl:someValuesFrom>
>                     </owl:Restriction>
>                 </owl:intersectionOf>
>             </owl:Class>
>         </owl:equivalentClass>
> In another thread replied me that I can find the equivalent class, modify
> the value and replace with new axiom.
> I can to find the equivalent class:
> Set<OWLEquivalentClassesAxiom> prova =
> ontology.getEquivalentClassesAxioms(typeClass);
> EquivalentClasses(<http://www.semanticweb.org/ontologies/Ontology1284376968132.owl#TemperatureTooWarm>
> ObjectIntersectionOf(<http://www.semanticweb.org/ontologies/Ontology1284376968132.owl#Temperature>
> DataSomeValuesFrom(<http://www.semanticweb.org/ontologies/Ontology1284376968132.owl#hasFeatureTemperature>
> DataRangeRestriction(xsd:float facetRestriction(minInclusive
> "35"^^xsd:float)))) )
> but I don't know how replace the value. I use OWLAPI 3.0 and I can't use
> OWLAxiomChange(ontology , axima), right?
> Can I make a new class with the same axiom of the previous class and replace
> it?How can I make a defined class with owlapi, I've found only:
>
> ConvertSuperClassesToEquivalentClass(OWLDataFactory dataFactory,
> OWLClass cls, java.util.Set<OWLOntology> ontologies,
> OWLOntology targetOntology)
>
> but I've only an ontology, why must I use a set of ontologies?

Because it's supposed to work with one or more ontologies; you can
create a set of ontologies on the fly with new
HashSet(Arrays.asList(yourOntology)).

To replace an axiom: once you have your OWLEquivalentClassesAxiom, you
can remove it from the ontology with OWLOntologyManager::removeAxiom,
and add the new one by creating it with an OWLDataFactory, that you
can obtain from the OWLOntologyManager itself; the method is
OWLDataFactory::getOWLEquivalentClassesAxiom (I'm looking at the
OWLAPI 3.1 code; I'm not 100% sure the name is exactly the same in the
previous release, but there must be something similar).
HTH,
I.

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