WSDL is an XML-based language used to describe Web Services and how to access Web Services.

WSDL document syntax

A WSDL document is just a simple XML document.

It contains a series of definitions that describe a web service.

WSDL document example

這是某個 WSDL 文檔的簡化的片段：

<message?name="getTermRequest">
??<part?name="term"?type="xs:string"/>
</message>
<message?name="getTermResponse">
??<part?name="value"?type="xs:string"/>
</message>
<portType?name="glossaryTerms">
??<operation?name="getTerm">
????<input?message="getTermRequest"/>
????<output?message="getTermResponse"/>
??</operation>
</portType>