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="Forconi--ancora-protesta-terza-giornata-7.jpg" />
  </query-continue>
  <query>
    <pages>
      <page ns="6" title="File:Burka on the job - Crossing guard in Alberta.jpg" missing="" />
      <page ns="6" title="File:Cloud icon.jpg" missing="" />
      <page ns="6" title="File:Commons-logo.svg" missing="" />
      <page ns="6" title="File:Communism - Nazism - Feminism.svg" missing="" />
      <page ns="6" title="File:Disambig-dark.png" missing="" />
      <page ns="6" title="File:Feed-icon.png" missing="" />
      <page ns="6" title="File:Feminismus verlassen Ausfahrt Freiheit.jpg" missing="" />
      <page ns="6" title="File:Fiat Lux, Sather Gate detail.jpg" missing="" />
      <page ns="6" title="File:Filename.mp3" missing="" />
      <page ns="6" title="File:Filename.pdf" missing="" />
    </pages>
  </query>
</api>