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="Bigdendogram.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="247" ns="6" title="File:2pg-research-summary-1jan13.doc" />
      <page pageid="21" ns="6" title="File:ACT option.png" />
      <page pageid="51" ns="6" title="File:ACT results.png" />
      <page pageid="52" ns="6" title="File:Act-2500bp-1.jpg" />
      <page pageid="53" ns="6" title="File:Act-5000bp-1.jpg" />
      <page pageid="55" ns="6" title="File:Agg.jpg" />
      <page pageid="54" ns="6" title="File:Agg Baf155 exp.jpg" />
      <page pageid="133" ns="6" title="File:Agg wg.png" />
      <page pageid="167" ns="6" title="File:Alg.png" />
      <page pageid="317" ns="6" title="File:Bass Fourth Floor Plan.pdf" />
    </pages>
  </query>
</api>