对于业务流程中的每个状态，我们也对每个需要支持转换动作的域对象的属性和它们之间的关系进行建模。

For each state in the business process, we also model the attributes of each domain object and the relationships between them needed to support the actions of the transitions.

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取消动作被视为一条入站消息，可以触发流程作用域的事件处理程序。

The cancellation action is regarded as an inbound message that can trigger the event handler of the process scope.

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当这个属性没有出现或者值为FALSE时，只在portlet请求作用域维护动作的请求参数。

When this attribute isn't present or is FALSE the action's request parameters are only maintained for the duration of the portlet request scope.

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