建立数据流时，我们使用意图框架。

When we set up flows, we are using the intent framework.

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它们涉及如何建立数据流模型，如何表示事件和触发器，如何正确终止流程以及如何在分层流程模型中重用活动。

They address modeling of data flow, representation of events and triggers, correct termination of a process, and reuse of activities in hierarchical process models.

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现在看看相反的过程，从数据流建立内存对象模型。

Now take a look at the the reverse process — building an in-memory object model from a data stream.

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