Object level conflict detection is provided. In an optimistic concurrency embodiment, when an object is to be updated, the database system is checked to determine whether any data related to fields of the object have changed since the object was read. This can be accomplished by storing a copy of the...http://www.google.de/patents/US7139690?utm_source=gb-gplus-sharePatent US7139690 - Object-level conflict detection in an object-relational database system
