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 aistart="2016-05-15T22:43:20Z" />
  </query-continue>
  <query>
    <allimages>
      <img name="FAL_20Rnd_mag.png" timestamp="2016-06-28T14:07:07Z" user="Below" url="http://dayz.wiki/images/b/bb/FAL_20Rnd_mag.png" descriptionurl="http://dayz.wiki/Datei:FAL_20Rnd_mag.png" ns="6" title="Datei:FAL 20Rnd mag.png" />
      <img name="FN_FAL_Original_Buttstock.png" timestamp="2016-06-28T14:02:54Z" user="Below" url="http://dayz.wiki/images/1/1b/FN_FAL_Original_Buttstock.png" descriptionurl="http://dayz.wiki/Datei:FN_FAL_Original_Buttstock.png" ns="6" title="Datei:FN FAL Original Buttstock.png" />
      <img name="FN_FAL_Folding_Buttstock.png" timestamp="2016-06-28T14:02:49Z" user="Below" url="http://dayz.wiki/images/a/a2/FN_FAL_Folding_Buttstock.png" descriptionurl="http://dayz.wiki/Datei:FN_FAL_Folding_Buttstock.png" ns="6" title="Datei:FN FAL Folding Buttstock.png" />
      <img name="Reflex_Sight.png" timestamp="2016-06-28T13:57:53Z" user="Below" url="http://dayz.wiki/images/f/fa/Reflex_Sight.png" descriptionurl="http://dayz.wiki/Datei:Reflex_Sight.png" ns="6" title="Datei:Reflex Sight.png" />
      <img name="Telnyashka_Undershirt.png" timestamp="2016-05-15T23:25:06Z" user="Below" url="http://dayz.wiki/images/2/23/Telnyashka_Undershirt.png" descriptionurl="http://dayz.wiki/Datei:Telnyashka_Undershirt.png" ns="6" title="Datei:Telnyashka Undershirt.png" />
      <img name="Sneakers.png" timestamp="2016-05-15T23:25:03Z" user="Below" url="http://dayz.wiki/images/a/ad/Sneakers.png" descriptionurl="http://dayz.wiki/Datei:Sneakers.png" ns="6" title="Datei:Sneakers.png" />
      <img name="Slacks_Pants_Beige.png" timestamp="2016-05-15T23:09:01Z" user="Below" url="http://dayz.wiki/images/9/93/Slacks_Pants_Beige.png" descriptionurl="http://dayz.wiki/Datei:Slacks_Pants_Beige.png" ns="6" title="Datei:Slacks Pants Beige.png" />
      <img name="Slacks_Pants_Blue.png" timestamp="2016-05-15T23:08:48Z" user="Below" url="http://dayz.wiki/images/9/97/Slacks_Pants_Blue.png" descriptionurl="http://dayz.wiki/Datei:Slacks_Pants_Blue.png" ns="6" title="Datei:Slacks Pants Blue.png" />
      <img name="Dirt_Bike_Helmet_Mouthguard.png" timestamp="2016-05-15T22:43:34Z" user="Below" url="http://dayz.wiki/images/f/f6/Dirt_Bike_Helmet_Mouthguard.png" descriptionurl="http://dayz.wiki/Datei:Dirt_Bike_Helmet_Mouthguard.png" ns="6" title="Datei:Dirt Bike Helmet Mouthguard.png" />
      <img name="Dirt_Bike_Helmet_with_Mouthguard.png" timestamp="2016-05-15T22:43:28Z" user="Below" url="http://dayz.wiki/images/3/38/Dirt_Bike_Helmet_with_Mouthguard.png" descriptionurl="http://dayz.wiki/Datei:Dirt_Bike_Helmet_with_Mouthguard.png" ns="6" title="Datei:Dirt Bike Helmet with Mouthguard.png" />
    </allimages>
  </query>
</api>