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="20080529 6e30858d6c64f6fc3860lXbHjo9Mez3I.gif" />
  </query-continue>
  <query>
    <pages>
      <page pageid="5993" ns="6" title="File:0214-digitimes.jpg" />
      <page pageid="5994" ns="6" title="File:0222-ncku-campus.jpg" />
      <page pageid="5995" ns="6" title="File:0222-ncku-campus2.jpg" />
      <page pageid="5996" ns="6" title="File:0227-nctu-campus.jpg" />
      <page pageid="5997" ns="6" title="File:0227-nctu-campus2.jpg" />
      <page pageid="5998" ns="6" title="File:0409-cycu-campus.jpg" />
      <page pageid="8494" ns="6" title="File:1000mACable.jpg" />
      <page pageid="8979" ns="6" title="File:1024fix.jpg" />
      <page pageid="9398" ns="6" title="File:150.png" />
      <page pageid="5863" ns="6" title="File:2-usb-receptables.jpg" />
    </pages>
  </query>
</api>