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>
    <allpages apcontinue="Bang_&amp;_Olufsen_Systems" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="1413" ns="0" title="BD - Bidirectional command processor" />
      <p pageid="3355" ns="0" title="BFGTech GeForce 7600GS 512MB" />
      <p pageid="3951" ns="0" title="BFG GeForce 7300 GS" />
      <p pageid="3468" ns="0" title="BFG GeForce 7300 GT" />
      <p pageid="3941" ns="0" title="BFG GeForce 7600GT 256MB" />
      <p pageid="2310" ns="0" title="Backend" />
      <p pageid="2028" ns="0" title="Backup-and-Restore" />
      <p pageid="4941" ns="0" title="Backup Database.sh" />
      <p pageid="2027" ns="0" title="Backup and Restore" />
      <p pageid="6277" ns="0" title="Bananapi mythtv" />
    </allpages>
  </query>
</api>