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="Dosbox_ipxtunnel_tcp_server.gif|57798" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2" ns="0" title="Basic Setup and Installation of DosBox" />
      <page pageid="15" ns="0" title="Dosbox.conf" />
      <page pageid="191" ns="0" title="GAMES:Star Wars: Dark Forces" />
      <page pageid="257" ns="0" title="GAMES:Descent" />
      <page pageid="539" ns="0" title="GAMES:Crazy Drake" />
      <page pageid="57792" ns="0" title="PPP configuration on linux host" />
      <page pageid="57798" ns="0" title="Networking using DOSBox IPX" />
    </pages>
  </query>
</api>