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="ADS Install 5b.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="235" ns="6" title="File:91pspstu zip.jpg" />
      <page pageid="69" ns="6" title="File:ADS Agilent.gif" />
      <page pageid="83" ns="6" title="File:ADS Install 0.jpg" />
      <page pageid="84" ns="6" title="File:ADS Install 1.jpg" />
      <page pageid="85" ns="6" title="File:ADS Install 2.jpg" />
      <page pageid="86" ns="6" title="File:ADS Install 3a.jpg" />
      <page pageid="87" ns="6" title="File:ADS Install 3b.jpg" />
      <page pageid="88" ns="6" title="File:ADS Install 3c.jpg" />
      <page pageid="89" ns="6" title="File:ADS Install 4.jpg" />
      <page pageid="90" ns="6" title="File:ADS Install 5a.jpg" />
    </pages>
  </query>
</api>