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-continue>
    <allimages gaifrom="20081117013231 453 2d.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="165" ns="6" title="File:20080106175329 188.png" />
      <page pageid="168" ns="6" title="File:20080123003020 172.png" />
      <page pageid="104" ns="6" title="File:20080325142752 641.jpg" />
      <page pageid="105" ns="6" title="File:20080325142851 234.jpg" />
      <page pageid="166" ns="6" title="File:20080507201652 766.png" />
      <page pageid="169" ns="6" title="File:20080809114456 969.png" />
      <page pageid="170" ns="6" title="File:20080809114501 016.png" />
      <page pageid="171" ns="6" title="File:20080809114513 360.png" />
      <page pageid="172" ns="6" title="File:20080809114535 469.png" />
      <page pageid="173" ns="6" title="File:20080809114556 219.png" />
    </pages>
  </query>
</api>