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Posted to users@jena.apache.org by Tim Harsch <ha...@yahoo.com> on 2011/03/03 01:31:01 UTC
write an OWL file
If I have a regular model that was loaded with N-triples, and those N-triples represented an OWL ontology, how could I write it back out such that I would see everything in OWL XML?
What I did was something similar to:
Model curModel = FileManager.get().loadModel(file);
OntModel asOwl = ModelFactory.createOntologyModel( OntModelSpec.OWL_MEM );
asOwl.add(curModel);
FileWriter fstream = new FileWriter(filePath);
BufferedWriter out = new BufferedWriter(fstream);
grandSchema.write(out);
The resulting XML is expressed in pure RDF/XML:
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:owl="http://www.w3.org/2002/07/owl#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" >
<rdf:Description rdf:about="http://example.org/unnamed0">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Ontology"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/unnamed0#Uncle">
<owl:equivalentClass rdf:resource="http://example.org/unnamed0#XXX"/>
<rdfs:subClassOf rdf:resource="http://example.org/unnamed0#Person"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
</rdf:Description>
...
but should look more like the following OWL (created by opening the output file with Top Braid Composer and saving it back out):
<owl:Class rdf:about="http://example.org/unnamed0#Uncle">
<owl:equivalentClass>
<owl:Class rdf:about="http://example.org/unnamed0#XXX"/>
</owl:equivalentClass>
<rdfs:subClassOf>
<owl:Class rdf:about="http://example.org/unnamed0#Person"/>
</rdfs:subClassOf>
</owl:Class>
Re: write an OWL file
Posted by Ian Dickinson <ia...@epimorphics.com>.
On 03/03/11 00:31, Tim Harsch wrote:
> If I have a regular model that was loaded with N-triples, and those N-triples represented an OWL ontology, how could I write it back out such that I would see everything in OWL XML?
>
> What I did was something similar to:
> Model curModel = FileManager.get().loadModel(file);
>
> OntModel asOwl = ModelFactory.createOntologyModel( OntModelSpec.OWL_MEM );
> asOwl.add(curModel);
> FileWriter fstream = new FileWriter(filePath);
>
> BufferedWriter out = new BufferedWriter(fstream);
> grandSchema.write(out);
grandSchema.write( out, "RDF/XML-ABBREV" ), per [1]
Ian
[1]
http://jena.sourceforge.net/javadoc/com/hp/hpl/jena/rdf/model/Model.html#write(java.io.OutputStream,%20java.lang.String)
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