OF - Object Node: Control Buffer (CB) CB is special Object Node for saving and passing on object tokens Transient memory (temporary) Accepts incoming object tokens from object nodes and passes them on to other object nodes I ■ . . When an object token is read from the central buffer, it is deleted from the central buffer and cannot be consumed again In contrast to pins and activity parameters, a central buffer is not bound to actions or activities. Key management for the seminar room Grant access authorization > KeyCabinet Conduct tasks Withdraw access authorization

I have a HW that is asking me to draw on ERD diagram for a simple purchasing system that has order with order id, customer id, and date; order consists of one or more items; items consist of item id, description and price, and customers list customer id, name, and address. Can you help?

Which two UML diagrams are most common? Their goal?

Which two types of UML diagrams are used the most frequently? What is their end goal?