Three Elements Statecharts extend conventional state-transition diagrams with essentially three elements Hierarchy Concurrency Communication In a nutshell,one can say 口 statecharts state-diagrams depth orthogonality broadcast-communication Tian Zhang Nanjing University 10Tian Zhang @ Nanjing University 10 Three Elements „ Statecharts extend conventional state-transition diagrams with essentially three elements : ‰ Hierarchy ‰ Concurrency ‰ Communication „ In a nutshell, one can say : ‰ statecharts = state-diagrams + depth orthogonality + broadcast-communication