You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <pages>
      <page pageid="25" ns="6" title="File:Screenshot tng ios a 2011 06.png" />
      <page pageid="26" ns="6" title="File:Screenshot tng ios b 2011 06.png" />
      <page pageid="20" ns="6" title="File:Screenshot tng kde 2010.03.05.png" />
      <page pageid="28" ns="6" title="File:Screenshot tng kde 2011 06.png" />
      <page pageid="24" ns="6" title="File:Screenshot tng mac 2010.11.11.png" />
      <page pageid="27" ns="6" title="File:Screenshot tng mac 2011 06.png" />
      <page pageid="29" ns="6" title="File:Screenshot tng win 2011 06.png" />
    </pages>
  </query>
</api>