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>
    <allimages>
      <img name="Advanced_boot_manager_01.png" timestamp="2014-07-07T13:13:47Z" user="Nigel Verity" url="http://wiki.pointlinux.org/images/4/47/Advanced_boot_manager_01.png" descriptionurl="http://wiki.pointlinux.org/index.php?title=File:Advanced_boot_manager_01.png" ns="6" title="File:Advanced boot manager 01.png" />
      <img name="Advanced_boot_manager.png" timestamp="2014-07-07T13:06:08Z" user="Nigel Verity" url="http://wiki.pointlinux.org/images/4/4e/Advanced_boot_manager.png" descriptionurl="http://wiki.pointlinux.org/index.php?title=File:Advanced_boot_manager.png" ns="6" title="File:Advanced boot manager.png" />
      <img name="Boot_screen_2.3.1.png" timestamp="2014-07-07T12:45:04Z" user="Nigel Verity" url="http://wiki.pointlinux.org/images/8/83/Boot_screen_2.3.1.png" descriptionurl="http://wiki.pointlinux.org/index.php?title=File:Boot_screen_2.3.1.png" ns="6" title="File:Boot screen 2.3.1.png" />
      <img name="Installation_summary.png" timestamp="2014-07-04T13:37:48Z" user="Nigel Verity" url="http://wiki.pointlinux.org/images/5/59/Installation_summary.png" descriptionurl="http://wiki.pointlinux.org/index.php?title=File:Installation_summary.png" ns="6" title="File:Installation summary.png" />
      <img name="Define_boot_manager.png" timestamp="2014-07-04T13:25:55Z" user="Nigel Verity" url="http://wiki.pointlinux.org/images/e/e8/Define_boot_manager.png" descriptionurl="http://wiki.pointlinux.org/index.php?title=File:Define_boot_manager.png" ns="6" title="File:Define boot manager.png" />
      <img name="Set_partitioning.png" timestamp="2014-07-04T12:56:57Z" user="Nigel Verity" url="http://wiki.pointlinux.org/images/6/6b/Set_partitioning.png" descriptionurl="http://wiki.pointlinux.org/index.php?title=File:Set_partitioning.png" ns="6" title="File:Set partitioning.png" />
      <img name="Select_disk.png" timestamp="2014-07-04T12:54:07Z" user="Nigel Verity" url="http://wiki.pointlinux.org/images/e/eb/Select_disk.png" descriptionurl="http://wiki.pointlinux.org/index.php?title=File:Select_disk.png" ns="6" title="File:Select disk.png" />
      <img name="Create_initial_user.png" timestamp="2014-07-04T12:52:07Z" user="Nigel Verity" url="http://wiki.pointlinux.org/images/8/8a/Create_initial_user.png" descriptionurl="http://wiki.pointlinux.org/index.php?title=File:Create_initial_user.png" ns="6" title="File:Create initial user.png" />
      <img name="Select_keyboard.png" timestamp="2014-07-04T12:49:17Z" user="Nigel Verity" url="http://wiki.pointlinux.org/images/0/0e/Select_keyboard.png" descriptionurl="http://wiki.pointlinux.org/index.php?title=File:Select_keyboard.png" ns="6" title="File:Select keyboard.png" />
      <img name="Select_timezone.png" timestamp="2014-07-04T12:46:41Z" user="Nigel Verity" url="http://wiki.pointlinux.org/images/3/30/Select_timezone.png" descriptionurl="http://wiki.pointlinux.org/index.php?title=File:Select_timezone.png" ns="6" title="File:Select timezone.png" />
    </allimages>
  </query>
  <query-continue>
    <allimages aistart="2014-07-04T12:42:55Z" />
  </query-continue>
</api>