title: Selecting a specific table with XPath
body: <p>I've got an XHTML document, and I want to select the only table in it with class="index". </p>
  
  <p>If I understand correctly, the descendant axis will select all nodes directly and indirectly descending from the current node, so here's what I've got.</p>
  
  <pre><code>//descendant::table[@class="index"]
  </code></pre>
  
  <p>It doesn't appear to be working when tested with xmlstarlet. Is my tool broke, or is the XPath expression wrong?</p>