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="Domains_registrieren|83" />
  </query-continue>
  <query>
    <pages>
      <page pageid="115" ns="14" title="Kategorie:Windows" />
      <page pageid="123" ns="0" title="Blackberry World" />
      <page pageid="124" ns="0" title="Amazon Appstore" />
      <page pageid="125" ns="0" title="Snap" />
      <page pageid="126" ns="0" title="Android Apps für Blackberry" />
      <page pageid="129" ns="0" title="Service - Onlinehilfe" />
      <page pageid="133" ns="0" title="PRO Speicher" />
      <page pageid="141" ns="0" title="Borland Database Engine" />
      <page pageid="180" ns="0" title="NETZ Speicher" />
      <page pageid="219" ns="0" title="Speicherverwaltung" />
    </pages>
  </query>
</api>