UML mainly has three types of elements: 1) Basic building block 2) Rules (rule) 3) Communication Mechanism, the basic construction blocks include three types: 1) Things 2) Relationship ( RELATIONSHIP) 3) Figure (Diagram) where things are divided into four types: # structual thing. Structure things in UML include class, interface, collaboration, use case, Active Class, component (Component), and Node. # BehaviORAL Thing. Behavior in UML includes interactive and state machine. # Grouping Things. The things in UML are package (package). # 注释 事 事. Note things in UML are annotations (NOTE). There are 4 types of relationships: # dependence # association # 泛化 # 实 (Realization)
