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    <p>There's no difference. An OWL ontology encoded in RDF is just another RDF document - there's nothing special about the OWL syntax as far as Jena is concerned. What matters in an RDF document is what triples it contains: that's why you can have RDF encoded in XML, Turtle or N-triples and they're all equivalent - just different ways of writing down the same triples.</p> <p>Once an RDF tool has loaded the triples into a graph (i.e. a <code>Model</code> in Jena), then it can give a different interpretation to terms from the <code>owl:</code> namespace.</p> <p><strong>Update</strong></p> <p>OK, following request in the comment here is code that generates your output sample:</p> <pre class="lang-java prettyprint-override"><code>package example; import com.hp.hpl.jena.ontology.*; import com.hp.hpl.jena.rdf.model.ModelFactory; import com.hp.hpl.jena.vocabulary.*; public class OWLOutputExample { public static final String PLANTS = "http://www.linkeddatatools.com/plants"; public static void main( String[] args ) { new OWLOutputExample().run(); } public void run() { OntModel m = ModelFactory.createOntologyModel( OntModelSpec.OWL_MEM ); setNamespaces( m ); populateOntology( m ); writeOntology( m ); } private void setNamespaces( OntModel m ) { m.setNsPrefix( "owl", OWL.getURI() ); m.setNsPrefix( "rdf", RDF.getURI() ); m.setNsPrefix( "rdfs", RDFS.getURI() ); m.setNsPrefix( "dc", DC_11.getURI() ); m.setNsPrefix( "plants", PLANTS ); } private void populateOntology( OntModel m ) { Ontology ont = m.createOntology( PLANTS ); ont.addProperty( DC_11.title, "The LinkedDataTools.com Example Plant Ontology" ) .addProperty( DC_11.description, "An example ontology written for the " + "LinkedDataTools.com RDFS &amp; OWL introduction tutorial" ); OntClass plantType = m.createClass( PLANTS + "#planttype" ); plantType.addProperty( RDFS.label, "The plant type" ) .addProperty( RDFS.comment, "The class of plant types." ); } private void writeOntology( OntModel m ) { m.write( System.out, "RDF/XML-ABBREV" ); } } </code></pre> <p>Output:</p> <pre class="lang-xml prettyprint-override"><code>&lt;rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:plants="http://www.linkeddatatools.com/plants" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"&gt; &lt;owl:Ontology rdf:about="http://www.linkeddatatools.com/plants"&gt; &lt;dc:description&gt;An example ontology written for the LinkedDataTools.com RDFS &amp;amp; OWL introduction tutorial&lt;/dc:description&gt; &lt;dc:title&gt;The LinkedDataTools.com Example Plant Ontology&lt;/dc:title&gt; &lt;/owl:Ontology&gt; &lt;owl:Class rdf:about="http://www.linkeddatatools.com/plants#planttype"&gt; &lt;rdfs:comment&gt;The class of plant types.&lt;/rdfs:comment&gt; &lt;rdfs:label&gt;The plant type&lt;/rdfs:label&gt; &lt;/owl:Class&gt; &lt;/rdf:RDF&gt; </code></pre> <p>Note that <code>rdfs:description</code> is not a known RDFS property, so I left it out.</p>
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    1. POHow to create OWL document
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    1. USIan Dickinson
    1. USIan Dickinson
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    1. POHow to create OWL document
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    1. COI understand what you are saying, But what I want to know is how to write above OWL document in Jena, Can you please give me the code to produce that OWL document.
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      1. USuser360321
    2. COFantastic!!!! Thank you very much. This is exactly I wanted to know. If you don't mind,I have another question for you. I want to use this OWL document and dynamically add sub classes for the classes I have in this OWL document? Can you suggest me a good way for this?
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    3. CO@user360321 That's really a separate question. [This answer](http://stackoverflow.com/a/18804302/1281433) has some examples of adding subclasses, though.
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      1. USJoshua Taylor
 

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