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"?>
    <allpages apcontinue="Idea:Work_Unit" />
      <p pageid="197" ns="0" title="Bookmarks" />
      <p pageid="7" ns="0" title="Bootstrap:Footer" />
      <p pageid="20" ns="0" title="Bootstrap:Subnav" />
      <p pageid="3" ns="0" title="Bootstrap:TitleBar" />
      <p pageid="21" ns="0" title="Conference:HOME CINEMA 3.17" />
      <p pageid="443" ns="0" title="Essai de typologie de l’art numérique" />
      <p pageid="423" ns="0" title="Gallery:Fortuitous glitch" />
      <p pageid="460" ns="0" title="Gallery:Rothko baker" />
      <p pageid="459" ns="0" title="Gallery:Smash customizer" />
      <p pageid="440" ns="0" title="Google maps space-time bubbles" />