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="09-Space-time.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="5688" ns="6" title="File:- MC Hua 01.jpg">
        <duplicatefiles>
          <df name="MC_Hua_01.jpg" user="Xian-Sheng Hua" timestamp="2007-11-16T15:14:32Z" />
        </duplicatefiles>
      </page>
      <page pageid="30108" ns="6" title="File:01-Eight-species.png" />
      <page pageid="30109" ns="6" title="File:02-Eyes-to-V1.png" />
      <page pageid="9455" ns="6" title="File:0252881 Fig913.jpg" />
      <page pageid="30110" ns="6" title="File:03-Human-V1.png" />
      <page pageid="30111" ns="6" title="File:04-Retinotopy.png" />
      <page pageid="30112" ns="6" title="File:05-Simple-cell.png" />
      <page pageid="30113" ns="6" title="File:06-Complex-cell.png" />
      <page pageid="30114" ns="6" title="File:07-Descriptive-models.png" />
      <page pageid="30115" ns="6" title="File:08-Spatial-selectivity.png" />
    </pages>
  </query>
</api>