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="20080316093501|Archiefon5ny_p01.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="DL9BDM.png" timestamp="2013-08-22T17:05:53Z" user="On5ny" url="http://www.on5ny.be/wiki/images/2/2d/DL9BDM.png" descriptionurl="http://www.on5ny.be/wiki/index.php/File:DL9BDM.png" ns="6" title="File:DL9BDM.png" />
      <img name="Reis_2009.jpg" timestamp="2010-03-13T13:29:26Z" user="On5ny" url="http://www.on5ny.be/wiki/images/e/e3/Reis_2009.jpg" descriptionurl="http://www.on5ny.be/wiki/index.php/File:Reis_2009.jpg" ns="6" title="File:Reis 2009.jpg" />
      <img name="MyfirstShack.jpg" timestamp="2010-02-27T11:55:44Z" user="Walter" url="http://www.on5ny.be/wiki/images/f/f4/MyfirstShack.jpg" descriptionurl="http://www.on5ny.be/wiki/index.php/File:MyfirstShack.jpg" ns="6" title="File:MyfirstShack.jpg" />
      <img name="Shack2010.JPG" timestamp="2010-02-20T16:37:53Z" user="Walter" url="http://www.on5ny.be/wiki/images/1/12/Shack2010.JPG" descriptionurl="http://www.on5ny.be/wiki/index.php/File:Shack2010.JPG" ns="6" title="File:Shack2010.JPG" />
      <img name="Antennas_2_70.jpg" timestamp="2010-02-20T16:33:13Z" user="Walter" url="http://www.on5ny.be/wiki/images/0/0c/Antennas_2_70.jpg" descriptionurl="http://www.on5ny.be/wiki/index.php/File:Antennas_2_70.jpg" ns="6" title="File:Antennas 2 70.jpg" />
      <img name="1m_dish_dual_feed_L_BAND.jpg" timestamp="2010-02-20T16:30:53Z" user="Walter" url="http://www.on5ny.be/wiki/images/5/59/1m_dish_dual_feed_L_BAND.jpg" descriptionurl="http://www.on5ny.be/wiki/index.php/File:1m_dish_dual_feed_L_BAND.jpg" ns="6" title="File:1m dish dual feed L BAND.jpg" />
      <img name="AO-40-ant.jpg" timestamp="2010-02-20T16:22:03Z" user="Walter" url="http://www.on5ny.be/wiki/images/6/6e/AO-40-ant.jpg" descriptionurl="http://www.on5ny.be/wiki/index.php/File:AO-40-ant.jpg" ns="6" title="File:AO-40-ant.jpg" />
      <img name="L_band_Helix.jpg" timestamp="2010-02-20T16:21:35Z" user="Walter" url="http://www.on5ny.be/wiki/images/8/82/L_band_Helix.jpg" descriptionurl="http://www.on5ny.be/wiki/index.php/File:L_band_Helix.jpg" ns="6" title="File:L band Helix.jpg" />
      <img name="Shack5.jpg" timestamp="2010-02-03T20:10:06Z" user="On5ny" url="http://www.on5ny.be/wiki/images/d/dc/Shack5.jpg" descriptionurl="http://www.on5ny.be/wiki/index.php/File:Shack5.jpg" ns="6" title="File:Shack5.jpg" />
      <img name="Archiefon5ny_p01b.PNG" timestamp="2008-03-16T09:36:59Z" user="On5ny" url="http://www.on5ny.be/wiki/images/c/c3/Archiefon5ny_p01b.PNG" descriptionurl="http://www.on5ny.be/wiki/index.php/File:Archiefon5ny_p01b.PNG" ns="6" title="File:Archiefon5ny p01b.PNG" />
    </allimages>
  </query>
</api>