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"?>
    <allfileusages afcontinue="Be9ccdfe0cea820dd32ac58d78e10b09.jpg" />
      <f ns="6" title="File:Babuskur (640x480).jpg" />
      <f ns="6" title="File:Baby chair1.JPG" />
      <f ns="6" title="File:Baby chair2 600.JPG" />
      <f ns="6" title="File:Baby chair creation1 600.JPG" />
      <f ns="6" title="File:Baby chair creation2 600.JPG" />
      <f ns="6" title="File:Balsfjorden &amp; Lyngsalpene summits.jpg" />
      <f ns="6" title="File:Bande logos régionaux fds 2013.jpg" />
      <f ns="6" title="File:Barustigur1.png" />
      <f ns="6" title="File:Bastidor salma 38-760645.jpg" />
      <f ns="6" title="File:Basw.png" />