[hibernate-dev] Hibernate Envers > link between to auditable entities

Hello, we have in our model entity P (product) and entity O (offer). The two entities have a link. one instance of P can have one or many O instances. an instance O has a reference to only one instance of P. The link is managed in the O side. P and O are revisioned by Hibernate Envers. Two use cases to cover: 1) If P instance is updated (new revision) we want that O keep the link with the old revision of P. 2) When I update O instance, I will move the reference to the last revision of O instance. What we did is, inside O class we added to attributes P.id and P.revision. So when we load the object P we use these to fields to load manually (O DAO has reference P DAO). Is there a better way to do it? Should we keep the reference of P in O instance as auditable and Envers will manage? Thanks, Tarek