title: Split node value with XPath
body: <p>Is there some kind of <code>split()</code> function in XPath?
  Say I have this XML:</p>
  
  <pre><code>&lt;root&gt;
     &lt;path&gt;C:\folder\filename&lt;/path&gt;
  &lt;/root&gt;
  </code></pre>
  
  <p>And I want to retrieve <code>filename</code>, how can I do this? I know I can get the node value like this:</p>
  
  <pre><code>//path/text()
  </code></pre>
  
  <p>How can I get only the filename? (I know there is a <code>concat()</code> function, so maybe there is a <code>split()</code> function?)</p>