Signaling the end of the method wars, the Object Management Group (OMG) first standardized the Unified Modeling Language in 1997. The software industry rapidly accepted it as the standard modeling language for specifying software and system architectures. Although UML is primarily intended for general-purpose modeling, it's receiving extensive use in diverse specialized areas, such as business process modeling and real-time-systems modeling. Despite these successes, development tools have been slow to realize UMLs full potential. In this article, we look at some major improvements proposed for UML 2.0.