UML Roots and Evolution:UML2 -------…2009 UML 2.3 --------2005 UML 2.0(MDA) 2003 UML 1.5(Action Semantics) UML 1.4 (bug fixes) UML 1.3(profiles) UML 1.1(First OMG Standard) 1996 Rumbaugh Booch Harel Jacobson Semantic Foundations of OO(Nygaard,Goldberg,Meyer, Stroustrup,Harel,Wirfs-Brock,Reenskaug,...) 9/71 1967UML Roots and Evolution: UML2 llxx@ustc.edu.cn 9/71