title: Get an attribute from a node using another "multi-values"attribute XML/XSL
body: <p>I don't understand how to reach an attribute searching for a "multi-values" attribute.</p>
  
  <p>I'll write down an example from W3school</p>
  
  <p>[link: <a href="https://www.w3schools.com/xml/xpath_examples.asp" rel="nofollow noreferrer">https://www.w3schools.com/xml/xpath_examples.asp</a> ]</p>
  
  <pre><code>&lt;bookstore&gt;
  &lt;book category="web"&gt;
    &lt;title lang="en"&gt;XQuery Kick Start&lt;/title&gt;
    &lt;author&gt;James McGovern&lt;/author&gt;
    &lt;author&gt;Per Bothner&lt;/author&gt;
    &lt;author&gt;Kurt Cagle&lt;/author&gt;
    &lt;author&gt;James Linn&lt;/author&gt;
    &lt;author&gt;Vaidyanathan Nagarajan&lt;/author&gt;
    &lt;year&gt;2003&lt;/year&gt;
    &lt;price&gt;49.99&lt;/price&gt;
  &lt;/book&gt;
  
  &lt;/bookstore&gt;
  </code></pre>
  
  <p>How can I get, for example, the title searching with the string <code>&lt;xsl:value-of "/bookstore/book[author = James McGovern]/title"/&gt;</code>.</p>
  
  <p>Can someone help me? I'm new to use XML and XSL.</p>
  
  <p>Thanks.</p>