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How to force OWL-API to use shortened IRIs in RDF/XML? #1107

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trojczak opened this issue Jun 30, 2023 · 1 comment
Open

How to force OWL-API to use shortened IRIs in RDF/XML? #1107

trojczak opened this issue Jun 30, 2023 · 1 comment

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@trojczak
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Hi!

I have the following simple code:

OWLOntologyManager ontologyManager = OWLManager.createOWLOntologyManager();
OWLDataFactory dataFactory = ontologyManager.getOWLDataFactory();
OWLOntology ontology = ontologyManager.createOntology(IRI.create(PREFIX));

OWLClass owlClass1 = dataFactory.getOWLClass(IRI.create(PREFIX + "C1"));
OWLClass owlClass2 = dataFactory.getOWLClass(IRI.create(PREFIX2 + "C2"));

ontology.addAxiom(dataFactory.getOWLDeclarationAxiom(owlClass1));
ontology.addAxiom(dataFactory.getOWLDeclarationAxiom(owlClass2));

RDFXMLDocumentFormat format = new RDFXMLDocumentFormat();
format.setPrefix("o2:", PREFIX2);
ontologyManager.saveOntology(ontology, format, IRI.create("file:/some/path"));

The saved ontology looks like this (I've removed comments):

<?xml version="1.0"?>
<rdf:RDF xmlns="http://example.com/ontology1/"
     xml:base="http://example.com/ontology1/"
     xmlns:o2="http://example.com/ontology2/"
     xmlns:owl="http://www.w3.org/2002/07/owl#"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:xml="http://www.w3.org/XML/1998/namespace"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">
    <owl:Ontology rdf:about="http://example.com/ontology1/"/>

    <owl:Class rdf:about="http://example.com/ontology1/C1"/>

    <owl:Class rdf:about="http://example.com/ontology2/C2"/>
</rdf:RDF>

My goal here is to force OWL-API to use shortened IRIs inside the rdf:about property. I.e. to have something like this:

<owl:Class rdf:about="&o2;C2"/>
@ignazio1977 ignazio1977 changed the title How to force OWL-API to use DTDs in RDF/XML? How to force OWL-API to use shortened IRIs in RDF/XML? Jul 13, 2023
@ignazio1977
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format.setPrefix("o2:", PREFIX2);

The semicolon shouldn't be there in the prefix name, try

format.setPrefix("o2", PREFIX2);

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@trojczak @ignazio1977