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="20181026094658|Warframe_screenshot_build_sobek.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="Image_037.png" timestamp="2018-11-25T20:53:36Z" user="Yasueh" url="http://wiki.polar-lights.org.uk/images/7/71/Image_037.png" descriptionurl="http://wiki.polar-lights.org.uk/File:Image_037.png" ns="6" title="File:Image 037.png" />
      <img name="Warframe_screenshot_build_titania_razorwing_efficiency.png" timestamp="2018-10-30T19:00:10Z" user="Yasueh" url="http://wiki.polar-lights.org.uk/images/8/86/Warframe_screenshot_build_titania_razorwing_efficiency.png" descriptionurl="http://wiki.polar-lights.org.uk/File:Warframe_screenshot_build_titania_razorwing_efficiency.png" ns="6" title="File:Warframe screenshot build titania razorwing efficiency.png" />
      <img name="Warframe_screenshot_build_prisma_veritux.png" timestamp="2018-10-29T04:14:38Z" user="Yasueh" url="http://wiki.polar-lights.org.uk/images/2/23/Warframe_screenshot_build_prisma_veritux.png" descriptionurl="http://wiki.polar-lights.org.uk/File:Warframe_screenshot_build_prisma_veritux.png" ns="6" title="File:Warframe screenshot build prisma veritux.png" />
      <img name="Warframe_screenshot_build_imperator_vandal.png" timestamp="2018-10-29T04:14:12Z" user="Yasueh" url="http://wiki.polar-lights.org.uk/images/4/4d/Warframe_screenshot_build_imperator_vandal.png" descriptionurl="http://wiki.polar-lights.org.uk/File:Warframe_screenshot_build_imperator_vandal.png" ns="6" title="File:Warframe screenshot build imperator vandal.png" />
      <img name="Warframe_screenshot_build_itzal.png" timestamp="2018-10-29T04:13:14Z" user="Yasueh" url="http://wiki.polar-lights.org.uk/images/e/ec/Warframe_screenshot_build_itzal.png" descriptionurl="http://wiki.polar-lights.org.uk/File:Warframe_screenshot_build_itzal.png" ns="6" title="File:Warframe screenshot build itzal.png" />
      <img name="Warframe_screenshot_build_amesha.png" timestamp="2018-10-29T04:12:32Z" user="Yasueh" url="http://wiki.polar-lights.org.uk/images/c/c7/Warframe_screenshot_build_amesha.png" descriptionurl="http://wiki.polar-lights.org.uk/File:Warframe_screenshot_build_amesha.png" ns="6" title="File:Warframe screenshot build amesha.png" />
      <img name="Warframe_screenshot_build_braton_prime_slash_viral.png" timestamp="2018-10-26T10:15:56Z" user="Yasueh" url="http://wiki.polar-lights.org.uk/images/e/e5/Warframe_screenshot_build_braton_prime_slash_viral.png" descriptionurl="http://wiki.polar-lights.org.uk/File:Warframe_screenshot_build_braton_prime_slash_viral.png" ns="6" title="File:Warframe screenshot build braton prime slash viral.png" />
      <img name="Warframe_screenshot_build_kohm_elements.png" timestamp="2018-10-26T09:55:04Z" user="Yasueh" url="http://wiki.polar-lights.org.uk/images/e/e4/Warframe_screenshot_build_kohm_elements.png" descriptionurl="http://wiki.polar-lights.org.uk/File:Warframe_screenshot_build_kohm_elements.png" ns="6" title="File:Warframe screenshot build kohm elements.png" />
      <img name="Warframe_screenshot_build_kohm_viral_slash.png" timestamp="2018-10-26T09:54:45Z" user="Yasueh" url="http://wiki.polar-lights.org.uk/images/c/c6/Warframe_screenshot_build_kohm_viral_slash.png" descriptionurl="http://wiki.polar-lights.org.uk/File:Warframe_screenshot_build_kohm_viral_slash.png" ns="6" title="File:Warframe screenshot build kohm viral slash.png" />
      <img name="Warframe_screenshot_build_kohm_dismemberer.png" timestamp="2018-10-26T09:54:08Z" user="Yasueh" url="http://wiki.polar-lights.org.uk/images/3/3f/Warframe_screenshot_build_kohm_dismemberer.png" descriptionurl="http://wiki.polar-lights.org.uk/File:Warframe_screenshot_build_kohm_dismemberer.png" ns="6" title="File:Warframe screenshot build kohm dismemberer.png" />
    </allimages>
  </query>
</api>