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="CaveOrc.PNG|722" />
  </query-continue>
  <query>
    <pages>
      <page pageid="74" ns="0" title="The Badlands" />
      <page pageid="562" ns="0" title="Broken Mace" />
      <page pageid="568" ns="0" title="Bones of Konimas Original War Party" />
      <page pageid="575" ns="0" title="Blue Dragon Scale" />
      <page pageid="576" ns="0" title="Blue Mushroom" />
      <page pageid="585" ns="0" title="Blue Heartstone" />
      <page pageid="586" ns="0" title="Brown Heartstone" />
      <page pageid="838" ns="0" title="Reincarnation" />
      <page pageid="940" ns="0" title="Bone Priestess" />
      <page pageid="1337" ns="0" title="Ma&#039;xeochicatl" />
    </pages>
  </query>
</api>