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>
    <allimages aicontinue="Diagramm.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Db_hevc_src01.jpg" timestamp="2014-09-17T11:06:23Z" url="http://vqegjeg.intec.ugent.be/wiki/images/7/70/Db_hevc_src01.jpg" descriptionurl="http://vqegjeg.intec.ugent.be/wiki/index.php/File:Db_hevc_src01.jpg" ns="6" title="File:Db hevc src01.jpg" />
      <img name="Db_hevc_src02.jpg" timestamp="2014-09-17T11:07:11Z" url="http://vqegjeg.intec.ugent.be/wiki/images/d/de/Db_hevc_src02.jpg" descriptionurl="http://vqegjeg.intec.ugent.be/wiki/index.php/File:Db_hevc_src02.jpg" ns="6" title="File:Db hevc src02.jpg" />
      <img name="Db_hevc_src03.jpg" timestamp="2014-09-17T11:07:18Z" url="http://vqegjeg.intec.ugent.be/wiki/images/2/23/Db_hevc_src03.jpg" descriptionurl="http://vqegjeg.intec.ugent.be/wiki/index.php/File:Db_hevc_src03.jpg" ns="6" title="File:Db hevc src03.jpg" />
      <img name="Db_hevc_src04.jpg" timestamp="2014-09-17T11:07:45Z" url="http://vqegjeg.intec.ugent.be/wiki/images/f/f5/Db_hevc_src04.jpg" descriptionurl="http://vqegjeg.intec.ugent.be/wiki/index.php/File:Db_hevc_src04.jpg" ns="6" title="File:Db hevc src04.jpg" />
      <img name="Db_hevc_src05.jpg" timestamp="2014-09-17T11:07:50Z" url="http://vqegjeg.intec.ugent.be/wiki/images/3/3c/Db_hevc_src05.jpg" descriptionurl="http://vqegjeg.intec.ugent.be/wiki/index.php/File:Db_hevc_src05.jpg" ns="6" title="File:Db hevc src05.jpg" />
      <img name="Db_hevc_src06.jpg" timestamp="2014-09-17T11:07:59Z" url="http://vqegjeg.intec.ugent.be/wiki/images/4/41/Db_hevc_src06.jpg" descriptionurl="http://vqegjeg.intec.ugent.be/wiki/index.php/File:Db_hevc_src06.jpg" ns="6" title="File:Db hevc src06.jpg" />
      <img name="Db_hevc_src07.jpg" timestamp="2014-09-17T11:08:04Z" url="http://vqegjeg.intec.ugent.be/wiki/images/9/97/Db_hevc_src07.jpg" descriptionurl="http://vqegjeg.intec.ugent.be/wiki/index.php/File:Db_hevc_src07.jpg" ns="6" title="File:Db hevc src07.jpg" />
      <img name="Db_hevc_src08.jpg" timestamp="2014-09-17T11:08:10Z" url="http://vqegjeg.intec.ugent.be/wiki/images/4/44/Db_hevc_src08.jpg" descriptionurl="http://vqegjeg.intec.ugent.be/wiki/index.php/File:Db_hevc_src08.jpg" ns="6" title="File:Db hevc src08.jpg" />
      <img name="Db_hevc_src09.jpg" timestamp="2014-09-17T11:08:15Z" url="http://vqegjeg.intec.ugent.be/wiki/images/a/a4/Db_hevc_src09.jpg" descriptionurl="http://vqegjeg.intec.ugent.be/wiki/index.php/File:Db_hevc_src09.jpg" ns="6" title="File:Db hevc src09.jpg" />
      <img name="Db_hevc_src10.jpg" timestamp="2014-09-17T11:08:21Z" url="http://vqegjeg.intec.ugent.be/wiki/images/c/c8/Db_hevc_src10.jpg" descriptionurl="http://vqegjeg.intec.ugent.be/wiki/index.php/File:Db_hevc_src10.jpg" ns="6" title="File:Db hevc src10.jpg" />
    </allimages>
  </query>
</api>