XPath 使用谓词选择多个元素 [英] XPath selecting multiple elements with predicates

问题描述

我有一个 XPath 查询，它正在执行我想要的操作，即选择姓氏"和带有给定谓词的given-names"(实际上是我需要的，但联合工作正常):

I have an XPath query which is doing what I want, namely selecting a union of 'surname' & 'given-names' with the given predicates (It's actually either/or that I need, but the union works fine):

/header/authors/surname[./text() and @id='1']
|
/header/authors/given-names[./text() and @id='1']

然而，这对我来说似乎过于冗长，我觉得应该可以做一些更简洁的事情，例如:

However this seems overly long-winded to me and I feel that it should be possible to do something more succinct such as:

/header/authors/(surname|given-names)[./text() and @id='1']

...但是这个版本不是有效的 XPath.

... but this version is not valid XPath.

谁能告诉我编写原始 XPath 表达式的更简洁的方法，它不需要将完整路径写两次?

Can anyone tell me of a neater way of writing the original XPath expression which doesn't require the full path to be written twice?

谢谢

理查德

推荐答案

首先，这是有效的 XPath 2.0:

First, this is valid XPath 2.0:

/header/authors/(surname|given-names)[./text() and @id='1'] 

其次，这个XPath 1.0:

Second, this XPath 1.0:

/header/authors/*[self::surname|self::given-names][text()][@id='1'] 

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