Web services are described using Web services Description Language (WSDL), and you will need a WSDL file to instantiate the pattern.

Web服务使用Web服务描述语言(WSDL)进行描述，您需要一个WSDL文件来实例化该模式。

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One of the complicated problems of pattern description is the effect of recursive structures on the nature of a pattern as a class of the formal language.

模式的递归结构影响它的形式语言性质，成为模式结构描述的复杂问题之一。

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