LoadOWLOntologyFromDB

2010-05-01T12:03:58Z

Chris31: getOwlModel method name correction

How do I load a Protege-OWL ontology from a Protege database using the API? 

'''Method 1'''

The simplest way to load a Protege-OWL ontology from a Protege database is to programatically load the project file (.pprj), which already contains all of the necessary database connection information:

<code>
<pre>
Project prj = Project.loadProjectFromFile("/home/pizza_db.pprj",errors);
OWLModel owlModel = (OWLModel) prj.getKnowledgeBase();
</pre>
</code> 

'''Method 2'''

The second method should be used if there is no project file (.pprj) associated with the Protege-OWL database ontology:

<code>
<pre>
JenaKnowledgeBaseFactory.useStandalone = false;
Collection errors = new ArrayList();
//the "false" argument means that it won't overide the existing table
OwlDatabaseCreator creator = new OwlDatabaseCreator(false);
creator.setDriver("com.mysql.jdbc.Driver");
creator.setURL("jdbc:mysql://localhost/protege");
creator.setUsername("protege");
creator.setPassword("mypass");
creator.setTable("tableName");
try {
creator.create(errors);
OWLModel owlModel = creator.getOwlModel();
} catch (OntologyLoadException e) {
e.printStackTrace();
}

</pre>
</code>

The "false" argument to the <pre>OwlDatabaseCreator</pre> class tells it to use an existing database rather than overwrite it.

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LoadOWLOntologyFromDB