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="ID_card|5" />
  </query-continue>
  <query>
    <pages>
      <page pageid="12" ns="0" title="Cave World" />
      <page pageid="5" ns="0" title="Low Energy Trains" />
      <page pageid="1" ns="0" title="Main Page" />
      <page pageid="8" ns="0" title="Pedelecs" />
      <page pageid="10" ns="0" title="Sustainable World Political System" />
      <page pageid="4" ns="0" title="Sustainable World Transportation System" />
    </pages>
  </query>
</api>