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="OgreAion_MainUI_Settings.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="OgreAion_Bot.png" timestamp="2013-05-13T03:48:43Z" url="https://wiki.ogregaming.com/aion/images/b/b1/OgreAion_Bot.png" descriptionurl="https://wiki.ogregaming.com/aion/index.php/File:OgreAion_Bot.png" ns="6" title="File:OgreAion Bot.png" />
      <img name="OgreAion_Console.png" timestamp="2013-05-15T00:40:09Z" url="https://wiki.ogregaming.com/aion/images/c/c8/OgreAion_Console.png" descriptionurl="https://wiki.ogregaming.com/aion/index.php/File:OgreAion_Console.png" ns="6" title="File:OgreAion Console.png" />
      <img name="OgreAion_MCP.png" timestamp="2013-05-13T03:59:57Z" url="https://wiki.ogregaming.com/aion/images/7/71/OgreAion_MCP.png" descriptionurl="https://wiki.ogregaming.com/aion/index.php/File:OgreAion_MCP.png" ns="6" title="File:OgreAion MCP.png" />
      <img name="OgreAion_MainUI_Alias.png" timestamp="2013-06-20T19:18:21Z" url="https://wiki.ogregaming.com/aion/images/9/94/OgreAion_MainUI_Alias.png" descriptionurl="https://wiki.ogregaming.com/aion/index.php/File:OgreAion_MainUI_Alias.png" ns="6" title="File:OgreAion MainUI Alias.png" />
      <img name="OgreAion_MainUI_Auth.png" timestamp="2013-05-18T01:56:03Z" url="https://wiki.ogregaming.com/aion/images/0/0e/OgreAion_MainUI_Auth.png" descriptionurl="https://wiki.ogregaming.com/aion/index.php/File:OgreAion_MainUI_Auth.png" ns="6" title="File:OgreAion MainUI Auth.png" />
      <img name="OgreAion_MainUI_AutoHunt.png" timestamp="2013-05-29T22:18:57Z" url="https://wiki.ogregaming.com/aion/images/6/69/OgreAion_MainUI_AutoHunt.png" descriptionurl="https://wiki.ogregaming.com/aion/index.php/File:OgreAion_MainUI_AutoHunt.png" ns="6" title="File:OgreAion MainUI AutoHunt.png" />
      <img name="OgreAion_MainUI_Combat.png" timestamp="2013-05-29T22:03:58Z" url="https://wiki.ogregaming.com/aion/images/5/56/OgreAion_MainUI_Combat.png" descriptionurl="https://wiki.ogregaming.com/aion/index.php/File:OgreAion_MainUI_Combat.png" ns="6" title="File:OgreAion MainUI Combat.png" />
      <img name="OgreAion_MainUI_Console.png" timestamp="2013-05-29T22:18:44Z" url="https://wiki.ogregaming.com/aion/images/5/5a/OgreAion_MainUI_Console.png" descriptionurl="https://wiki.ogregaming.com/aion/index.php/File:OgreAion_MainUI_Console.png" ns="6" title="File:OgreAion MainUI Console.png" />
      <img name="OgreAion_MainUI_HUDs.png" timestamp="2013-05-18T01:57:31Z" url="https://wiki.ogregaming.com/aion/images/4/4a/OgreAion_MainUI_HUDs.png" descriptionurl="https://wiki.ogregaming.com/aion/index.php/File:OgreAion_MainUI_HUDs.png" ns="6" title="File:OgreAion MainUI HUDs.png" />
      <img name="OgreAion_MainUI_Popups.png" timestamp="2013-05-29T22:07:22Z" url="https://wiki.ogregaming.com/aion/images/6/67/OgreAion_MainUI_Popups.png" descriptionurl="https://wiki.ogregaming.com/aion/index.php/File:OgreAion_MainUI_Popups.png" ns="6" title="File:OgreAion MainUI Popups.png" />
    </allimages>
  </query>
</api>