Web项目解决方案框架，一般的讲，大型系统采用UML UserCase表达客户需求。UML建模-Web projects solution framework, in general, large-scale systems using UML UserCase expression of customer needs. UML Modeling

软件工程用例图，用例图的定义，其中包含的元素，个元素之间的关系，课件中还包括了一些实例！-Software engineering, use case diagrams, use case diagram of the definition, which contains elements of the relationship between elements, courseware also includes a number of examples!