它们定义了输出文件的结构与输入数据源的结构。

They define the structure of the input data source and the structure of the output document.

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服务和局部任务在输入和输出数据、与之相关的资源等方面具有相同的属性。

Services and Local Tasks have the same attributes in terms of input and output data, resources associated to them, and so on.

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例如，您可以修改用作输入或输出的业务项数据，然后与表单进行同步。

For example, you can modify the data for the business item used as the input and output, then synchronize with the form.

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