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="Building_Missile_Silo.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Building_Alliance_Depot.jpg" timestamp="2010-12-03T00:09:39Z" url="http://owiki.battleworld.nl/images/8/8a/Building_Alliance_Depot.jpg" descriptionurl="http://owiki.battleworld.nl/File:Building_Alliance_Depot.jpg" ns="6" title="File:Building Alliance Depot.jpg" />
      <img name="Building_Crystal_Mine.jpg" timestamp="2010-12-03T00:10:16Z" url="http://owiki.battleworld.nl/images/0/00/Building_Crystal_Mine.jpg" descriptionurl="http://owiki.battleworld.nl/File:Building_Crystal_Mine.jpg" ns="6" title="File:Building Crystal Mine.jpg" />
      <img name="Building_Crystal_Storage.jpg" timestamp="2010-12-03T00:11:47Z" url="http://owiki.battleworld.nl/images/a/a5/Building_Crystal_Storage.jpg" descriptionurl="http://owiki.battleworld.nl/File:Building_Crystal_Storage.jpg" ns="6" title="File:Building Crystal Storage.jpg" />
      <img name="Building_Deuterium_Synthesizer.jpg" timestamp="2010-12-03T00:12:24Z" url="http://owiki.battleworld.nl/images/9/9a/Building_Deuterium_Synthesizer.jpg" descriptionurl="http://owiki.battleworld.nl/File:Building_Deuterium_Synthesizer.jpg" ns="6" title="File:Building Deuterium Synthesizer.jpg" />
      <img name="Building_Deuterium_Tank.jpg" timestamp="2010-12-03T00:13:21Z" url="http://owiki.battleworld.nl/images/4/47/Building_Deuterium_Tank.jpg" descriptionurl="http://owiki.battleworld.nl/File:Building_Deuterium_Tank.jpg" ns="6" title="File:Building Deuterium Tank.jpg" />
      <img name="Building_Fusion_Reactor.jpg" timestamp="2010-12-03T00:13:33Z" url="http://owiki.battleworld.nl/images/c/cd/Building_Fusion_Reactor.jpg" descriptionurl="http://owiki.battleworld.nl/File:Building_Fusion_Reactor.jpg" ns="6" title="File:Building Fusion Reactor.jpg" />
      <img name="Building_Jump_Gate.jpg" timestamp="2010-12-03T00:17:11Z" url="http://owiki.battleworld.nl/images/0/0d/Building_Jump_Gate.jpg" descriptionurl="http://owiki.battleworld.nl/File:Building_Jump_Gate.jpg" ns="6" title="File:Building Jump Gate.jpg" />
      <img name="Building_Lunar_Base.jpg" timestamp="2010-12-03T00:24:29Z" url="http://owiki.battleworld.nl/images/4/4a/Building_Lunar_Base.jpg" descriptionurl="http://owiki.battleworld.nl/File:Building_Lunar_Base.jpg" ns="6" title="File:Building Lunar Base.jpg" />
      <img name="Building_Metal_Mine.jpg" timestamp="2010-12-03T00:24:42Z" url="http://owiki.battleworld.nl/images/c/c9/Building_Metal_Mine.jpg" descriptionurl="http://owiki.battleworld.nl/File:Building_Metal_Mine.jpg" ns="6" title="File:Building Metal Mine.jpg" />
      <img name="Building_Metal_Storage.jpg" timestamp="2010-12-03T00:24:52Z" url="http://owiki.battleworld.nl/images/7/79/Building_Metal_Storage.jpg" descriptionurl="http://owiki.battleworld.nl/File:Building_Metal_Storage.jpg" ns="6" title="File:Building Metal Storage.jpg" />
    </allimages>
  </query>
</api>