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="03 AcceptLicense.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="50" ns="6" title="File:001 TelechargerRunningTracker.gif" />
      <page pageid="51" ns="6" title="File:002 SelectionnerLangue.gif" />
      <page pageid="52" ns="6" title="File:003 AccepterLicence.gif" />
      <page pageid="53" ns="6" title="File:004 Composants.gif" />
      <page pageid="54" ns="6" title="File:005 ChoisirCheminInstallation.gif" />
      <page pageid="55" ns="6" title="File:006 LancerRunningTracker.gif" />
      <page pageid="81" ns="6" title="File:01 DownloadRunningTracker.png" />
      <page pageid="27" ns="6" title="File:01 TelechargerRunningTracker.gif" />
      <page pageid="26" ns="6" title="File:02 LancerInstalleur.gif" />
      <page pageid="82" ns="6" title="File:02 SelectLanguage.png" />
    </pages>
  </query>
</api>