A Boundary Event is attached to an activity to indicate abnormal execution of some kind (i.e., something has happened such that the normal sequence flow from the activity does not occur).
BoundaryEvent附加到一个活动，表示某种类型的异常执行(也就是说，发生了某些导致活动的正常序列流无法执行的事件)。
A Boundary Event is attached to an activity to indicate abnormal execution of some kind (i.e., something has happened such that the normal sequence flow from the activity does not occur).
BoundaryEvent附加到一个活动，表示某种类型的异常执行(也就是说，发生了某些导致活动的正常序列流无法执行的事件)。
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