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="Dymoclock.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="15" ns="6" title="File:6809.jpg" />
      <page pageid="74" ns="6" title="File:BG-CASTER arriere.JPG" />
      <page pageid="77" ns="6" title="File:BG-CASTER avant.JPG" />
      <page pageid="75" ns="6" title="File:BG-CASTER canal1.JPG" />
      <page pageid="76" ns="6" title="File:BG-CASTER canal2.JPG" />
      <page pageid="78" ns="6" title="File:BG-CASTER dessus.JPG" />
      <page pageid="68" ns="6" title="File:Circuit.PNG" />
      <page pageid="65" ns="6" title="File:DCF77-led-clock.jpg" />
      <page pageid="63" ns="6" title="File:Diode-as-temperature-sensor.jpg" />
      <page pageid="14" ns="6" title="File:Dragon32.jpg" />
    </pages>
  </query>
</api>