UML 2.0
"Last week the OMG adopted the superstructure document for UML 2. In practice this means that UML 2 is agreed on. There are numerous changes to the UML in UML 2 - it represents the biggest overhaul to the UML since the UML was originally agreed on. For general users the most obvious changes are probably:
- Interaction Frame notation added to sequence diagrams
- Collaboration diagrams renamed to communication diagrams
- Activity diagrams are no longer a special case of state diagrams - as a result they get a host of new things
- A notation for composite structures allows you to describe classes hierarchically"