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="Architecture Gnuutilities context.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="643" ns="6" title="File:20140915214301.jpg" />
      <page pageid="707" ns="6" title="File:Ace.png" />
      <page pageid="528" ns="6" title="File:Add Remote Item.jpg" />
      <page pageid="718" ns="6" title="File:Amami.png" />
      <page pageid="177" ns="6" title="File:Architecture Baseessentials Context.png" />
      <page pageid="179" ns="6" title="File:Architecture Bluetooth Context.png" />
      <page pageid="173" ns="6" title="File:Architecture Centrallibraries Context.png" />
      <page pageid="175" ns="6" title="File:Architecture Dbus Context.png" />
      <page pageid="183" ns="6" title="File:Architecture Fontmanagement Context.png" />
      <page pageid="185" ns="6" title="File:Architecture Fonts Context.png" />
    </pages>
  </query>
</api>