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="Behavior.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Ball_moving.jpg" timestamp="2014-02-17T19:35:19Z" url="http://ipe.hyperbody.nl/images/f/fd/Ball_moving.jpg" descriptionurl="http://ipe.hyperbody.nl/index.php/File:Ball_moving.jpg" ns="6" title="File:Ball moving.jpg" />
      <img name="Banner.jpg" timestamp="2014-02-25T12:54:31Z" url="http://ipe.hyperbody.nl/images/b/b5/Banner.jpg" descriptionurl="http://ipe.hyperbody.nl/index.php/File:Banner.jpg" ns="6" title="File:Banner.jpg" />
      <img name="Banner_04.jpg" timestamp="2014-02-24T17:35:09Z" url="http://ipe.hyperbody.nl/images/7/75/Banner_04.jpg" descriptionurl="http://ipe.hyperbody.nl/index.php/File:Banner_04.jpg" ns="6" title="File:Banner 04.jpg" />
      <img name="Banner_05.jpg" timestamp="2014-02-27T13:29:27Z" url="http://ipe.hyperbody.nl/images/f/f7/Banner_05.jpg" descriptionurl="http://ipe.hyperbody.nl/index.php/File:Banner_05.jpg" ns="6" title="File:Banner 05.jpg" />
      <img name="Banner_06.jpg" timestamp="2014-02-27T13:40:10Z" url="http://ipe.hyperbody.nl/images/6/62/Banner_06.jpg" descriptionurl="http://ipe.hyperbody.nl/index.php/File:Banner_06.jpg" ns="6" title="File:Banner 06.jpg" />
      <img name="Banner_Delauney.jpg" timestamp="2014-05-16T09:02:38Z" url="http://ipe.hyperbody.nl/images/5/5b/Banner_Delauney.jpg" descriptionurl="http://ipe.hyperbody.nl/index.php/File:Banner_Delauney.jpg" ns="6" title="File:Banner Delauney.jpg" />
      <img name="Banner_group2.jpg" timestamp="2014-02-26T15:44:13Z" url="http://ipe.hyperbody.nl/images/b/b5/Banner_group2.jpg" descriptionurl="http://ipe.hyperbody.nl/index.php/File:Banner_group2.jpg" ns="6" title="File:Banner group2.jpg" />
      <img name="Banner_group2.png" timestamp="2014-06-20T11:14:44Z" url="http://ipe.hyperbody.nl/images/2/2e/Banner_group2.png" descriptionurl="http://ipe.hyperbody.nl/index.php/File:Banner_group2.png" ns="6" title="File:Banner group2.png" />
      <img name="Banner_group22.png" timestamp="2014-04-10T21:28:28Z" url="http://ipe.hyperbody.nl/images/5/50/Banner_group22.png" descriptionurl="http://ipe.hyperbody.nl/index.php/File:Banner_group22.png" ns="6" title="File:Banner group22.png" />
      <img name="Banner_group2_dark.png" timestamp="2014-06-23T11:51:48Z" url="http://ipe.hyperbody.nl/images/b/b2/Banner_group2_dark.png" descriptionurl="http://ipe.hyperbody.nl/index.php/File:Banner_group2_dark.png" ns="6" title="File:Banner group2 dark.png" />
    </allimages>
  </query>
</api>