In my experience, it is best to avoid these in your business use casemodel.
以我的经验,最好在你的业务用例模型中避免这些联系。
2
Principle 3: use requirement attributes to determine the best use casemodel.
原则3:使用需求属性决定最好的用例模型。
3
Structure your use casemodel appropriately (Principle 2: Challenge your use case goals and Principle 3: use requirement attributes to determine the best use casemodel).