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="Click_on_Arrow_to_adjust_the_arrow.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Bands_of_devel.jpg" timestamp="2016-12-09T16:03:46Z" url="http://help.actknowledge.org/images/c/ce/Bands_of_devel.jpg" descriptionurl="http://help.actknowledge.org/index.php?title=File:Bands_of_devel.jpg" ns="6" title="File:Bands of devel.jpg" />
      <img name="Bigstock-Pile-of-colorful-magazines-iso-29648957.jpg" timestamp="2016-12-09T15:58:25Z" url="http://help.actknowledge.org/images/d/d9/Bigstock-Pile-of-colorful-magazines-iso-29648957.jpg" descriptionurl="http://help.actknowledge.org/index.php?title=File:Bigstock-Pile-of-colorful-magazines-iso-29648957.jpg" ns="6" title="File:Bigstock-Pile-of-colorful-magazines-iso-29648957.jpg" />
      <img name="Browser_detail.jpg" timestamp="2017-01-22T18:26:39Z" url="http://help.actknowledge.org/images/f/f7/Browser_detail.jpg" descriptionurl="http://help.actknowledge.org/index.php?title=File:Browser_detail.jpg" ns="6" title="File:Browser detail.jpg" />
      <img name="Call_Out_Features.jpg" timestamp="2016-12-12T21:04:48Z" url="http://help.actknowledge.org/images/e/eb/Call_Out_Features.jpg" descriptionurl="http://help.actknowledge.org/index.php?title=File:Call_Out_Features.jpg" ns="6" title="File:Call Out Features.jpg" />
      <img name="Callout.jpg" timestamp="2017-01-21T21:19:35Z" url="http://help.actknowledge.org/images/a/ac/Callout.jpg" descriptionurl="http://help.actknowledge.org/index.php?title=File:Callout.jpg" ns="6" title="File:Callout.jpg" />
      <img name="Canvas.jpg" timestamp="2017-02-15T22:35:46Z" url="http://help.actknowledge.org/images/7/73/Canvas.jpg" descriptionurl="http://help.actknowledge.org/index.php?title=File:Canvas.jpg" ns="6" title="File:Canvas.jpg" />
      <img name="Canvas_tool_panel.jpg" timestamp="2016-08-16T19:42:29Z" url="http://help.actknowledge.org/images/1/1c/Canvas_tool_panel.jpg" descriptionurl="http://help.actknowledge.org/index.php?title=File:Canvas_tool_panel.jpg" ns="6" title="File:Canvas tool panel.jpg" />
      <img name="Canvas_tool_panel_for_wiki_copy.jpg" timestamp="2016-08-17T01:52:11Z" url="http://help.actknowledge.org/images/f/fe/Canvas_tool_panel_for_wiki_copy.jpg" descriptionurl="http://help.actknowledge.org/index.php?title=File:Canvas_tool_panel_for_wiki_copy.jpg" ns="6" title="File:Canvas tool panel for wiki copy.jpg" />
      <img name="Canvas_tool_panel_for_wiki_smaller.jpg" timestamp="2016-08-17T11:58:19Z" url="http://help.actknowledge.org/images/0/07/Canvas_tool_panel_for_wiki_smaller.jpg" descriptionurl="http://help.actknowledge.org/index.php?title=File:Canvas_tool_panel_for_wiki_smaller.jpg" ns="6" title="File:Canvas tool panel for wiki smaller.jpg" />
      <img name="Canvas_tool_panel_wiki.jpg" timestamp="2017-01-22T05:51:31Z" url="http://help.actknowledge.org/images/d/d3/Canvas_tool_panel_wiki.jpg" descriptionurl="http://help.actknowledge.org/index.php?title=File:Canvas_tool_panel_wiki.jpg" ns="6" title="File:Canvas tool panel wiki.jpg" />
    </allimages>
  </query>
</api>