UML 2003 -- The Unified Modeling Language, Modeling Languages and Applications 6th International Conference San Francisco, CA, USA, October 20-24, 2003, Proceedings - Stevens, Perdita; Stevens, Perdita; Whittle, Jon; Whittle, Jon; Booch, Grady; Booch, Grady (Springer Berlin Heidelberg : Imprint: Springer, 2003)