Which UML version does Rational XDE Developer currently support? Does it support UML 2.0?
It supports UML 1.4, although not all UML 1.4 capabilities are supported; for example, collaboration diagrams and object diagrams are currently not supported. Support for UML 2.0, when it’s finalized, is planned for the future. As of this writing, it’s not entirely clear what constitutes UML 2.0, since some issues are still open.