We describe a framework for the development of production rule programs on top of OWL ontologies, following a hybrid Object-Oriented (OO) approach. The hybrid nature is realized by separating ontologies and rules, interfacing an external DL reasoner and a production rule engine. The OO nature is realized by mapping OWL ontologies into the OO model, in such a way, so to preserve the extensional ontology semantics when the OO ontology constructs are matched in the production rule conditions.