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="AA2.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="7520" ns="6" title="File:01 ruby demon portal splash.png" />
      <page pageid="7586" ns="6" title="File:1 30 new figures.jpg" />
      <page pageid="12899" ns="6" title="File:3-Stage Rocket Boots.png" />
      <page pageid="13527" ns="6" title="File:AA-20.png" />
      <page pageid="11920" ns="6" title="File:AA1.png" />
      <page pageid="12192" ns="6" title="File:AA10.png" />
      <page pageid="12196" ns="6" title="File:AA11.png" />
      <page pageid="12250" ns="6" title="File:AA12.png" />
      <page pageid="12252" ns="6" title="File:AA13.png" />
      <page pageid="12255" ns="6" title="File:AA14.png" />
    </pages>
  </query>
</api>