XPath具有条件的多个属性值之一

本文介绍了XPath具有条件的多个属性值之一的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

给出以下表达式，如何使用=使其更加简洁明了?

Given the following expression, how can I use = to be more concise and explicit?

(//h2/@id[contains(.,"foo") or contains(.,"bar") or contains(.,"baz"))[last()]

这是我尝试过的方法，但我的口译员说这是无效的:

Here's what I tried, but my interpreter says it's not valid:

(//h2/@id[text() = ("foo", "bar", "baz")])[last()]

我不能使用contains()，因为我需要防止子字符串匹配.我正在使用XPath 1.0和一个相关问题的答案是该问题的推动力.

I cannot use contains() because I need to guard against substring matches. I'm using XPath 1.0 and an answer to a related question is the impetus for this question.

推荐答案

在XPath 2.0中，

In XPath 2.0,

(//h2[@id = ("foo", "bar", "baz")])[last()]

将选择文档中最后一个h2元素，该元素的id属性值为foo，bar或baz.

would select the last h2 element in the document with an id attribute value of foo, bar, or baz.

在XPath 1.0中，您将使用显式的布尔or运算符:

In XPath 1.0, you'd use explicit boolean or operators:

(//h2[@id="foo" or @id="bar" or @id="baz"])[last()]