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>
    <alllinks galcontinue="Grundwerte" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Bayes" missing="" />
      <page ns="0" title="Bottom-up vs. Top-down" missing="" />
      <page ns="0" title="Dame Circular" missing="" />
      <page ns="0" title="Der Zweck heiligt die Mittel" missing="" />
      <page ns="0" title="Die Zeit" missing="" />
      <page ns="0" title="Diskussionen" missing="" />
      <page ns="0" title="Getting Things Done" missing="" />
      <page pageid="2" ns="0" title="Blinken" />
      <page pageid="6" ns="0" title="Coders at Work" />
      <page pageid="7" ns="0" title="Das A-Team" />
    </pages>
  </query>
</api>