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我找不到Nokogiri支持的xpath版本的官方聲明。任何人都可以幫助我嗎?實際上,我想提取一些具有以指定子字符串開頭的屬性的元素。例如,我想讓所有Book
屬性的category
屬性以字符C
開頭。如何用nokogiri做到這一點?Nokogiri支持哪個版本的xpath?
<?xml version="1.0" encoding="ISO-8859-1"?>
<!-- Edited by XMLSpy?-->
<bookstore>
<book category="COOKING">
<title lang="en">Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
<book category="CHILDREN">
<title lang="en">Harry Potter</title>
<author>J K. Rowling</author>
<year>2005</year>
<price>29.99</price>
</book>
<book category="WEB">
<title lang="en">XQuery Kick Start</title>
<author>James McGovern</author>
<author>Per Bothner</author>
<author>Kurt Cagle</author>
<author>James Linn</author>
<author>Vaidyanathan Nagarajan</author>
<year>2003</year>
<price>49.99</price>
</book>
<book category="WEB">
<title lang="en">Learning XML</title>
<author>Erik T. Ray</author>
<year>2003</year>
<price>39.95</price>
</book>
</bookstore>
[「引入nokogiri僅支持XPath 1.0和不支持的XPath 2.0,該令牌化()是首先定義在。「](https://github.com/sparklemotion/nokogiri/issues/957)。這些限制是由於libxml2和javax.xml.xpath引起的 – jtzero