uml用例关系图,类关系图。等用于vos开发的一系列图。-uml use case diagram, class diagram. Such as for the development of a series of plans vos.

讲述了建模书写文档的规范，UML。尤其对描述类图，流程图有着借鉴作用。-the UML-unified modeling language, describes the documenting format.It is especially effective for drawing the class diagram and flow graph.