You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <allimages>
      <img name="Catalogue_record_detail_portlet_table_1.png" timestamp="2011-04-15T10:01:50Z" url="http://arenawiki.axiell.com/wiki/images/c/c9/Catalogue_record_detail_portlet_table_1.png" descriptionurl="http://arenawiki.axiell.com/wiki/index.php/File:Catalogue_record_detail_portlet_table_1.png" ns="6" title="File:Catalogue record detail portlet table 1.png" />
      <img name="Catalogue_record_detail_portlet_table_2.png" timestamp="2009-11-20T11:16:58Z" url="http://arenawiki.axiell.com/wiki/images/0/0d/Catalogue_record_detail_portlet_table_2.png" descriptionurl="http://arenawiki.axiell.com/wiki/index.php/File:Catalogue_record_detail_portlet_table_2.png" ns="6" title="File:Catalogue record detail portlet table 2.png" />
      <img name="Citynskyj.png" timestamp="2011-09-08T10:51:43Z" url="http://arenawiki.axiell.com/wiki/images/8/8a/Citynskyj.png" descriptionurl="http://arenawiki.axiell.com/wiki/index.php/File:Citynskyj.png" ns="6" title="File:Citynskyj.png" />
      <img name="DSC_5379.JPG" timestamp="2011-02-01T08:25:41Z" url="http://arenawiki.axiell.com/wiki/images/9/9f/DSC_5379.JPG" descriptionurl="http://arenawiki.axiell.com/wiki/index.php/File:DSC_5379.JPG" ns="6" title="File:DSC 5379.JPG" />
      <img name="Edit_close.png" timestamp="2009-09-17T16:07:07Z" url="http://arenawiki.axiell.com/wiki/images/a/a6/Edit_close.png" descriptionurl="http://arenawiki.axiell.com/wiki/index.php/File:Edit_close.png" ns="6" title="File:Edit close.png" />
      <img name="Edit_config.png" timestamp="2009-10-14T13:38:09Z" url="http://arenawiki.axiell.com/wiki/images/b/bf/Edit_config.png" descriptionurl="http://arenawiki.axiell.com/wiki/index.php/File:Edit_config.png" ns="6" title="File:Edit config.png" />
      <img name="Edit_configuration.png" timestamp="2009-09-17T15:16:58Z" url="http://arenawiki.axiell.com/wiki/images/d/d5/Edit_configuration.png" descriptionurl="http://arenawiki.axiell.com/wiki/index.php/File:Edit_configuration.png" ns="6" title="File:Edit configuration.png" />
      <img name="Edit_controls_toolbar.png" timestamp="2009-09-17T15:08:06Z" url="http://arenawiki.axiell.com/wiki/images/b/bf/Edit_controls_toolbar.png" descriptionurl="http://arenawiki.axiell.com/wiki/index.php/File:Edit_controls_toolbar.png" ns="6" title="File:Edit controls toolbar.png" />
      <img name="Edit_controls_toolbar2.png" timestamp="2009-10-14T13:41:37Z" url="http://arenawiki.axiell.com/wiki/images/3/3d/Edit_controls_toolbar2.png" descriptionurl="http://arenawiki.axiell.com/wiki/index.php/File:Edit_controls_toolbar2.png" ns="6" title="File:Edit controls toolbar2.png" />
      <img name="Edit_look_and_feel.png" timestamp="2009-09-17T15:17:09Z" url="http://arenawiki.axiell.com/wiki/images/a/aa/Edit_look_and_feel.png" descriptionurl="http://arenawiki.axiell.com/wiki/index.php/File:Edit_look_and_feel.png" ns="6" title="File:Edit look and feel.png" />
    </allimages>
  </query>
  <query-continue>
    <allimages aifrom="Edit maximize.png" />
  </query-continue>
</api>