Tham khảo tài liệu 'addison wesley writing effective use cases phần 10', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | PART 4 End Notes How could I not discuss the Unified Modeling Language and its impact on use cases UML actually impacts use case writing very little. Most of what I have to say about writing effective use cases fits inside one ellipse. Appendix A covers ellipses stick figures includes extends generalizes the attendant hazards and drawing guidelines. Appendix B provides answers to selected exercises. I hope you do those exercises and read the discussions provided with the answers. Appendix C is a glossary of the key terms used in the book. Appendix D is a list of the articles books and web pages I referred to along the way. 223 Chapter . Ellipses and Stick Figures - Page 224 Appendix A Use Cases in UML The Unified Modeling Language defines graphical icons that people are determined to use. It does not address use case content or writing style but it does provide lots of complexity for people to discuss. Spend your energy learning to write clear text instead. If you like diagrams learn the basics of the relations and then set a few simple standards to keep the drawings clear. Ellipses and Stick Figures When you walk to the whiteboard and start drawing pictures of people using the system it is very natural to draw a stick figure for the people and ellipses or boxes for the use cases they are calling upon. Label the stick figure with the title of the actor and the ellipse with the title of the use case. The information is the same as the actor-goal list but the presentation is different. The diagrams can be used as a table of far all is all fine and normal. The trouble starts when you or your readers believe that the diagrams define the functional requirements for the system. Some people get infatuated with the diagrams thinking they will make a hard job simple as in Figure 26. Mommy I want to go home on page 219 . They try to capture as much as possible in the diagram hoping perhaps that text will never have to be written. Here are two typical events
