XPath 1.0: Read the formal definition of XPath in the original specification.

XPath 1.0：查阅原始规范中对XPath的正式定义。

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WSDL 1.1 included a schema description in the original specification, but that schema didn't match the text descriptions in several respects.

WSDL 1.1在最初的规范中包含了一个模式描述，但是这个模式在几个方面上与内容描述并不匹配。

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It also suffers from the lack of an authoritative formal definition, resulting in successive "add on" clarifications that have patched some of the holes in the original specification document.

它也缺少一种权威的正式定义，导致后来需要“附加”说明来修补原始规范文档的各种漏洞。

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