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="1553a.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2129" ns="6" title="File:01LloydRymer.jpg" />
      <page pageid="1651" ns="6" title="File:01WalterBHanks.jpg" />
      <page pageid="1609" ns="6" title="File:01WildCat.jpg" />
      <page pageid="1548" ns="6" title="File:100 0145.JPG" />
      <page pageid="1553" ns="6" title="File:100 0151.JPG" />
      <page pageid="1539" ns="6" title="File:100 0154.JPG" />
      <page pageid="1390" ns="6" title="File:100 0156r.JPG" />
      <page pageid="1742" ns="6" title="File:100th Anniversary.jpg" />
      <page pageid="2787" ns="6" title="File:10 Hanks Buriel site.JPG" />
      <page pageid="2999" ns="6" title="File:12345.JPG" />
    </pages>
  </query>
</api>