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="Ctl_wndws_alt.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Bel_zd.jpg" timestamp="2011-05-05T07:59:22Z" url="http://xn--b1amah.xn--d1ad.xn--p1ai/w/images/9/92/Bel_zd.jpg" descriptionurl="http://xn--b1amah.xn--d1ad.xn--p1ai/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Bel_zd.jpg" ns="6" title="Файл:Bel zd.jpg" />
      <img name="Best_put_table.jpg" timestamp="2011-05-10T13:47:00Z" url="http://xn--b1amah.xn--d1ad.xn--p1ai/w/images/d/df/Best_put_table.jpg" descriptionurl="http://xn--b1amah.xn--d1ad.xn--p1ai/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Best_put_table.jpg" ns="6" title="Файл:Best put table.jpg" />
      <img name="Broom_icon.svg" timestamp="2013-12-30T06:16:43Z" url="http://xn--b1amah.xn--d1ad.xn--p1ai/w/images/2/2c/Broom_icon.svg" descriptionurl="http://xn--b1amah.xn--d1ad.xn--p1ai/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Broom_icon.svg" ns="6" title="Файл:Broom icon.svg" />
      <img name="Bulbgraph.png" timestamp="2011-07-07T07:35:53Z" url="http://xn--b1amah.xn--d1ad.xn--p1ai/w/images/6/60/Bulbgraph.png" descriptionurl="http://xn--b1amah.xn--d1ad.xn--p1ai/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Bulbgraph.png" ns="6" title="Файл:Bulbgraph.png" />
      <img name="Button_sig.png" timestamp="2013-12-30T06:06:07Z" url="http://xn--b1amah.xn--d1ad.xn--p1ai/w/images/6/6d/Button_sig.png" descriptionurl="http://xn--b1amah.xn--d1ad.xn--p1ai/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Button_sig.png" ns="6" title="Файл:Button sig.png" />
      <img name="CC_some_rights_reserved.svg" timestamp="2011-07-07T12:22:48Z" url="http://xn--b1amah.xn--d1ad.xn--p1ai/w/images/7/79/CC_some_rights_reserved.svg" descriptionurl="http://xn--b1amah.xn--d1ad.xn--p1ai/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:CC_some_rights_reserved.svg" ns="6" title="Файл:CC some rights reserved.svg" />
      <img name="Cc-by_new_white.svg" timestamp="2014-01-02T16:23:23Z" url="http://xn--b1amah.xn--d1ad.xn--p1ai/w/images/1/11/Cc-by_new_white.svg" descriptionurl="http://xn--b1amah.xn--d1ad.xn--p1ai/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Cc-by_new_white.svg" ns="6" title="Файл:Cc-by new white.svg" />
      <img name="Cc-by_white.svg" timestamp="2011-07-07T12:24:05Z" url="http://xn--b1amah.xn--d1ad.xn--p1ai/w/images/b/bd/Cc-by_white.svg" descriptionurl="http://xn--b1amah.xn--d1ad.xn--p1ai/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Cc-by_white.svg" ns="6" title="Файл:Cc-by white.svg" />
      <img name="Cc-sa_white.svg" timestamp="2011-07-07T12:24:59Z" url="http://xn--b1amah.xn--d1ad.xn--p1ai/w/images/d/df/Cc-sa_white.svg" descriptionurl="http://xn--b1amah.xn--d1ad.xn--p1ai/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Cc-sa_white.svg" ns="6" title="Файл:Cc-sa white.svg" />
      <img name="Crystal_Clear_action_run.png" timestamp="2014-01-02T16:24:41Z" url="http://xn--b1amah.xn--d1ad.xn--p1ai/w/images/5/5d/Crystal_Clear_action_run.png" descriptionurl="http://xn--b1amah.xn--d1ad.xn--p1ai/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Crystal_Clear_action_run.png" ns="6" title="Файл:Crystal Clear action run.png" />
    </allimages>
  </query>
</api>