Case guard

案卫───Case guard

each group there are generally three people (usually men in this case) : the leader and another "observer" (looking out for species) and a guard (just in case).───每个小组一般都由三个人组成(在这种情况下一般都是男士)：组长和另一位“观察员”(查找物种)以及一名警卫(以防万一)。

Decisions and guard conditions allow business analysts to show alternative paths in a business use case workflow.───决定和守卫条件允许业务分析师在业务用例流程中展示不同的路径。

The guard is evaluated when matching, but only extracting any variables in the preceding part of the case.───这个守卫会在匹配的时候进行评估，但是只会解出本case的变量。