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.
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.
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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