Ok...i needed some coffee at that time..:-(. They are showing valueObject in the class diagram. http://java.sun.com/blueprints/corej2eepatterns/Patterns/TransferObject.html
But i still think showing Transfer object would not hurt. Again as an architect your role would be to hand off the design document to the developers, and they should be able to start coding from that point..:-)
But its a matter of choice. I would atleast show the main DAO class and its mapping with the Entity/Session Bean. I think this would make it better as far as readability goes.
BTW, thanks for asking all these questions. They sure have helped me in introspecting the way I want to design the application...though i am feeling plain lazy right now and dont plan to start on it for another few weeks..:-)