Hello, I failed to find some more in-depth documentation for objects that are supported in Guvnor jar model but it seems that only instantiable beans are supported now. It would be more practical to support also interfaces. Here is the example I am trying to resolve: For database access I use JPA annotated class. I want to work with it in the Guvnor but also do not want to include JPA classes that the annotated class imports. So I thought of declaring an interface that is uploaded to Guvnor and JPA class would implement it. That it unfortunately not possible. I can only create model bean that is uploaded to Guvnor and the JPA class that extends the model bean. Is there any other elegant solution to this? Thank you! Libor Nenadál -- View this message in context: http://old.nabble.com/Java-interfaces-and-Buvnor-jar-model-tp26215739p262... Sent from the drools - user mailing list archive at Nabble.com.