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[protege-owl] Differences between OWL/RDF file and OWL/RDF database?

Tania Tudorache tudorache at
Thu Jul 1 15:37:11 PDT 2010

In terms of the API, there is no difference between a database project 
and file backend. Both the file backend (JenaOWLModel) and the database 
backend (OWLDatabaseModel) implement the OWLModel interface, which 
contains all the methods to access your ontology.

So, if you want to use your code with both the file and the database 
backend, make sure you use OWLModel, rather than JenaOWLModel.


On 07/01/2010 09:29 AM, aden ali wrote:
> Hello Everyone,
> I know that using Protege 3.4, there is a possibility either to use 
> OWL/RDF file or OWL/RDF database.And I know that if I want to use file 
> application for my plug-in so I can use:
> OWLModel model = (OWLModel) project.getKnowledgeBase();
> to get OWLModel from knowledge base but I wonder if I can use OWLModel 
> for database. Could someone help me to know what are their differences 
> programmatically speaking?
> Thank you in advance for your reply.
> Best regards,
> Tita
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