Web service interfaces can be described using Web Services Description language (WSDL), an XML-based vocabulary whose data types and structures can be realized in multiple programming languages.

WSDL (Web Services Description Language, Web服务描述语言)是一种基于XML的语言，可以用来描述Web服务的接口。WSDL的数据类型和数据结构可以用多种编程语言来实现。

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