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="2.Schritt.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="6289" ns="6" title="File:1.Bild.jpg" />
      <page pageid="6437" ns="6" title="File:1.Bild en.jpg" />
      <page pageid="6380" ns="6" title="File:1.Bild en.png" />
      <page pageid="6639" ns="6" title="File:1.Bild pt.jpg" />
      <page pageid="6399" ns="6" title="File:1.JUICE1.jpg" />
      <page pageid="6487" ns="6" title="File:1.JUICE1 en.jpg" />
      <page pageid="6687" ns="6" title="File:1.JUICE1 pt.jpg" />
      <page pageid="6282" ns="6" title="File:1.Schritt.jpg" />
      <page pageid="6610" ns="6" title="File:1.Schritt ModellDokumentation.png" />
      <page pageid="6618" ns="6" title="File:1.Schritt ModellDokumentation en.png" />
    </pages>
  </query>
</api>