You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages gaifrom="215353.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="297" ns="6" title="File:003214.jpg" />
      <page pageid="298" ns="6" title="File:003242.jpg" />
      <page pageid="250" ns="6" title="File:1497849 10153569112985251 1025227581 o.jpg" />
      <page pageid="130" ns="6" title="File:2012-07-24 21.09.48.jpg" />
      <page pageid="679" ns="6" title="File:20150916 120340.jpg" />
      <page pageid="680" ns="6" title="File:20150916 120351.jpg" />
      <page pageid="681" ns="6" title="File:20150916 120404.jpg" />
      <page pageid="534" ns="6" title="File:20160129 171906.jpg" />
      <page pageid="535" ns="6" title="File:20160129 171915.jpg" />
      <page pageid="682" ns="6" title="File:20160903 082111.jpg" />
    </pages>
  </query>
</api>