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="Crystal Clear app personal.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1611" ns="6" title="File:000.png" />
      <page pageid="1612" ns="6" title="File:025.png" />
      <page pageid="1613" ns="6" title="File:050.png" />
      <page pageid="1614" ns="6" title="File:075.png" />
      <page pageid="1615" ns="6" title="File:100.png" />
      <page pageid="1597" ns="6" title="File:BeamLocking.png" />
      <page pageid="1499" ns="6" title="File:Crystal 128 down.png" />
      <page pageid="1522" ns="6" title="File:Crystal 128 kuser.png" />
      <page pageid="1500" ns="6" title="File:Crystal Clear app display.png" />
      <page pageid="1502" ns="6" title="File:Crystal Clear app konsole.png" />
    </pages>
  </query>
</api>