xpath - Xpath-如何测试多个属性？

Question

<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 and the Deathly Hallows</title>
    <author>J.K. Rowling</author>
    <year>2007</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>
<book category="CHILDREN">
    <title lang="en">Harry Potter and the Chamber of Secrets</title>
    <author>J K. Rowling</author>
    <year>1998</year>
    <price>29.99</price>
</book>

我需要选择作者不止一本书的书名。我不确定如何做到这一点。我知道有几种方法可以针对此特定示例执行此操作，但我需要以实际检查多位作者的方式进行操作。

Answer 1

/bookstore/book[count(author) > 1]/title