You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allfileusages gafcontinue="BIH.png|605" />
  </query-continue>
  <query>
    <pages>
      <page pageid="418" ns="0" title="Rostocker FC Baltica Kiel" />
      <page pageid="474" ns="0" title="5. Liga Deutschland 2007/2008" />
      <page pageid="549" ns="0" title="4. Liga Deutschland 2002/2003" />
      <page pageid="580" ns="0" title="4. Liga Deutschland 2003/2004" />
      <page pageid="605" ns="0" title="4. Liga Deutschland 2004/2005" />
      <page pageid="606" ns="0" title="4. Liga Deutschland 2005/2006" />
      <page pageid="616" ns="0" title="4. Liga Deutschland 2007/2008" />
      <page pageid="884" ns="0" title="Düsseldorf 59" />
    </pages>
  </query>
</api>