title: Xpath for choosing next sibling
body: <p>I have piece of HTML like this:</p>
  
  <pre>
  &lt;dt>name&lt;/dt>
  &lt;dd>value&lt;/dd>
  &lt;dt>name2&lt;/dt>
  &lt;dd>value2&lt;/dd>
  </pre>
  
  <p>I want to find all places where the structure is incorrect, meaning there is no <code>dd</code> tag after <code>dt</code> tag.</p>
  
  <p>I tried this:</p>
  
  <pre>
  //dt/following-sibling::dt
  </pre>
  
  <p>but this doesn't work. Any suggestions?</p>