Web Services Description Language:
The Web Services Description Language (WSDL pronounced "wiz'-dul") is an XML-based interface definition language that is used for describing the functionality offered by a web service.
en.wikipedia.org
WSDL:
WSDL（Web服务描述语言，Web Services Description Language）是为描述Web服务发布的XML格式。
zh.wikipedia.org
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Web Services Description LanguageWSDL