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="Complete Config Show Streaming.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="248" ns="6" title="File:Complete Config Emailer.jpg" />
      <page pageid="249" ns="6" title="File:Complete Config Events.jpg" />
      <page pageid="250" ns="6" title="File:Complete Config Guide Data.jpg" />
      <page pageid="251" ns="6" title="File:Complete Config IVS.jpg" />
      <page pageid="252" ns="6" title="File:Complete Config JIT.jpg" />
      <page pageid="253" ns="6" title="File:Complete Config PPV.jpg" />
      <page pageid="256" ns="6" title="File:Complete Config Replays.jpg" />
      <page pageid="254" ns="6" title="File:Complete Config Replays DVA.jpg" />
      <page pageid="255" ns="6" title="File:Complete Config Replays WiRNS.jpg" />
      <page pageid="257" ns="6" title="File:Complete Config Show Paths.jpg" />
    </pages>
  </query>
</api>