对于那些需要向Web应用程序中传入以及从Web应用程序中传出的对象，应将它们序列化为输入输出流。

For the objects that you need to pass to and from the Web application, serialize them to the connection's input and output streams.

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由于工作流使用的输入输出数据格式是XML，所以我们需要xml元素名的规格说明。

As the input and output data format that workflow USES is XML, we require a specification of the XML element names.

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为了解决服务合成中的服务描述这一关键问题，提出了一种基于输入输出接口模型和数据流图模型的服务描述方法。

In order to resolve the service description problem of service composition, a service description method including mainly a (input-output) interface model and a data flow diagram model is put forward.

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