Hello, I have designed a class higher level diagram of the system. But that does not include specific interfaces and classes of entity and session beans. Do I need to go into that much detail - to show all the interfaces and classes each session or entity bean is made of and how the interaction amongst them and with other beans take place - in my class diagram. Personally I think doing this would mean going too much in the implementation details. Please send me your views. Thanks. Vibha.