Hi there, first some details of my environment, i'm using Drools Guvnor to create my rules and a MVC-Java application which accesses these rules. My facts are based on the models of the Java application, and are imported in Guvnor in a jar-file. I'm trying to integrate PropertyChangeSupport properly in my current project. In a previous version I used the RuleBase and inserted the objects with the boolean flag "dynamic" = true: boolean dynamic = true; WorkingMemory workingMemory = ruleBase.newStatefulSession(); workingMemory.insert(someObject, dynamic); This worked flawlessly. But since this is not possible in the Drools 5 Api I tried to use the @propertyChangeSupport annotation. My idea is to declare the metadata for the Object in this way: http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/drools-expert/ht... But the first problem is that I found no possibility in Guvnor to add metadata to a Fact Declaration, so for the purpose to test I created a temporary DRL File with all my rules and the declaration of the @propertyChangeSupport. Somehow like this: package somePackage import com.someObject declare someObject @propertyChangeSupport end [bunch of rules] ... But this isn't working, the object's property changes are ignored. Btw. the PropertyChangeListener is implemented correctly in the considered object. Do you have some hints to point me into the right direction? Thanks for help, Oliver Noack