UML 用例规约、事件流写法等的示例和指南

活动：详细说明用例
http://www.ir-lab.org/~car/programming/rup/process/activity/ac_desuc.htm

指南：用例
http://www.ir-lab.org/~car/programming/rup/process/modguide/md_uc.htm#Flow%20of%20Events%20-%20Contents

用例建模指南
http://www-128.ibm.com/developerworks/cn/rational/r-usecase-atm/

工具向导：使用 Rational RequisitePro® 详细说明用例
http://www.ir-lab.org/~car/programming/rup/toolment/reqpro/tm_desuc.htm