The Unified Modeling Language (UML) changed in a number of ways
from version 1.4 to version 2.0. While XDE is based on UML 1.4, the Rational® UML
modeling products support UML 2.0. Use this set of topics to understand the
more significant differences in UML notation between Rational XDE and the Rational UML
modeling products in the Rational Software Development Platform. The most
important changes between these UML versions are in the area of behavioral
diagrams; specifically, activity diagrams and sequence diagrams.
The following topics provide a good place to start learning about
the differences between UML 1.4 (as implemented by XDE) and UML 2.0; the topics
are not meant to be a comprehensive resource that documents every UML notation
and implementation difference. For additional information, refer to the UML
2.0 specification and resources on the IBM® developerWorks® Web site.