序列图主要用于按照交互发生的一系列顺序，显示对象之间的这些交互。很象类图，开发者一般认为序列图只对他们有意义。然而，一个组织的业务人员会发现，序 列图显示不同的业务对象如何交互，对于交流当前业务如何进行很有用。-Sequence diagram is mainly used for order in accordance with a series of interactions occur, indicating that these interactions between objects. Very much like a class diagram, sequence diagram is generally believed that the developer only makes sense to them. However, an organization' s operational staff will find the sequence diagram shows how the different business objects interact, for the exchange of current business how to be useful.