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="Feedback_Widget_Property.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="Channel_Content_Pages.png" timestamp="2012-10-05T15:39:50Z" url="https://wiki.unroole.com/images/7/74/Channel_Content_Pages.png" descriptionurl="https://wiki.unroole.com/article/File:Channel_Content_Pages.png" ns="6" title="File:Channel Content Pages.png" />
      <img name="Channel_Layout_Editor.png" timestamp="2012-07-30T19:26:28Z" url="https://wiki.unroole.com/images/d/d6/Channel_Layout_Editor.png" descriptionurl="https://wiki.unroole.com/article/File:Channel_Layout_Editor.png" ns="6" title="File:Channel Layout Editor.png" />
      <img name="Channel_Properties.png" timestamp="2012-11-15T15:37:56Z" url="https://wiki.unroole.com/images/2/20/Channel_Properties.png" descriptionurl="https://wiki.unroole.com/article/File:Channel_Properties.png" ns="6" title="File:Channel Properties.png" />
      <img name="Choose_Website_Channel.png" timestamp="2012-10-05T15:28:21Z" url="https://wiki.unroole.com/images/b/b7/Choose_Website_Channel.png" descriptionurl="https://wiki.unroole.com/article/File:Choose_Website_Channel.png" ns="6" title="File:Choose Website Channel.png" />
      <img name="Composite_Design_Layout.png" timestamp="2012-07-10T19:37:40Z" url="https://wiki.unroole.com/images/1/12/Composite_Design_Layout.png" descriptionurl="https://wiki.unroole.com/article/File:Composite_Design_Layout.png" ns="6" title="File:Composite Design Layout.png" />
      <img name="EasyDNS_CNAME.png" timestamp="2012-10-04T18:29:38Z" url="https://wiki.unroole.com/images/a/ab/EasyDNS_CNAME.png" descriptionurl="https://wiki.unroole.com/article/File:EasyDNS_CNAME.png" ns="6" title="File:EasyDNS CNAME.png" />
      <img name="EasyDNS_Edit_CNAME.png" timestamp="2012-10-04T18:31:39Z" url="https://wiki.unroole.com/images/8/8a/EasyDNS_Edit_CNAME.png" descriptionurl="https://wiki.unroole.com/article/File:EasyDNS_Edit_CNAME.png" ns="6" title="File:EasyDNS Edit CNAME.png" />
      <img name="Facebook_Comments_Widget_In_Action.png" timestamp="2012-11-15T16:53:58Z" url="https://wiki.unroole.com/images/1/19/Facebook_Comments_Widget_In_Action.png" descriptionurl="https://wiki.unroole.com/article/File:Facebook_Comments_Widget_In_Action.png" ns="6" title="File:Facebook Comments Widget In Action.png" />
      <img name="Facebook_Comments_Widget_Property.png" timestamp="2012-10-04T16:09:49Z" url="https://wiki.unroole.com/images/b/bd/Facebook_Comments_Widget_Property.png" descriptionurl="https://wiki.unroole.com/article/File:Facebook_Comments_Widget_Property.png" ns="6" title="File:Facebook Comments Widget Property.png" />
      <img name="Feedback_Widget_In_Action.png" timestamp="2012-10-03T15:02:30Z" url="https://wiki.unroole.com/images/9/9e/Feedback_Widget_In_Action.png" descriptionurl="https://wiki.unroole.com/article/File:Feedback_Widget_In_Action.png" ns="6" title="File:Feedback Widget In Action.png" />
    </allimages>
  </query>
</api>