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="Mongodb_lock_op.png" timestamp="2017-05-23T07:27:53Z" user="Dennis zhuang" url="http://wiki.fnil.net/images/c/c5/Mongodb_lock_op.png" descriptionurl="http://wiki.fnil.net/index.php?title=%E6%96%87%E4%BB%B6:Mongodb_lock_op.png" ns="6" title="文件:Mongodb lock op.png" />
      <img name="Amsterdam_compiler_kit.png" timestamp="2017-05-08T08:06:59Z" user="Dennis zhuang" url="http://wiki.fnil.net/images/9/9c/Amsterdam_compiler_kit.png" descriptionurl="http://wiki.fnil.net/index.php?title=%E6%96%87%E4%BB%B6:Amsterdam_compiler_kit.png" ns="6" title="文件:Amsterdam compiler kit.png" />
      <img name="Utf8.png" timestamp="2017-01-10T13:34:53Z" user="Dennis zhuang" url="http://wiki.fnil.net/images/c/c5/Utf8.png" descriptionurl="http://wiki.fnil.net/index.php?title=%E6%96%87%E4%BB%B6:Utf8.png" ns="6" title="文件:Utf8.png" />
      <img name="Json-number.png" timestamp="2017-01-05T13:24:27Z" user="Dennis zhuang" url="http://wiki.fnil.net/images/0/00/Json-number.png" descriptionurl="http://wiki.fnil.net/index.php?title=%E6%96%87%E4%BB%B6:Json-number.png" ns="6" title="文件:Json-number.png" />
      <img name="Simple_fast_queue2.png" timestamp="2017-01-03T11:37:46Z" user="Dennis zhuang" url="http://wiki.fnil.net/images/2/27/Simple_fast_queue2.png" descriptionurl="http://wiki.fnil.net/index.php?title=%E6%96%87%E4%BB%B6:Simple_fast_queue2.png" ns="6" title="文件:Simple fast queue2.png" />
      <img name="Simple_fast_queue1.png" timestamp="2017-01-03T11:37:23Z" user="Dennis zhuang" url="http://wiki.fnil.net/images/9/9a/Simple_fast_queue1.png" descriptionurl="http://wiki.fnil.net/index.php?title=%E6%96%87%E4%BB%B6:Simple_fast_queue1.png" ns="6" title="文件:Simple fast queue1.png" />
      <img name="Cluster-overview.png" timestamp="2016-07-28T11:21:23Z" user="Dennis zhuang" url="http://wiki.fnil.net/images/f/fe/Cluster-overview.png" descriptionurl="http://wiki.fnil.net/index.php?title=%E6%96%87%E4%BB%B6:Cluster-overview.png" ns="6" title="文件:Cluster-overview.png" />
      <img name="Smp.png" timestamp="2016-07-10T05:07:55Z" user="Dennis zhuang" url="http://wiki.fnil.net/images/5/54/Smp.png" descriptionurl="http://wiki.fnil.net/index.php?title=%E6%96%87%E4%BB%B6:Smp.png" ns="6" title="文件:Smp.png" />
      <img name="Lexer.png" timestamp="2016-06-16T08:53:08Z" user="Dennis zhuang" url="http://wiki.fnil.net/images/a/a8/Lexer.png" descriptionurl="http://wiki.fnil.net/index.php?title=%E6%96%87%E4%BB%B6:Lexer.png" ns="6" title="文件:Lexer.png" />
      <img name="Docker-filesystems-busyboxrw.png" timestamp="2014-01-15T13:04:40Z" user="Dennis zhuang" url="http://wiki.fnil.net/images/8/80/Docker-filesystems-busyboxrw.png" descriptionurl="http://wiki.fnil.net/index.php?title=%E6%96%87%E4%BB%B6:Docker-filesystems-busyboxrw.png" ns="6" title="文件:Docker-filesystems-busyboxrw.png" />
    </allimages>
  </query>
  <query-continue>
    <allimages aistart="2013-01-27T10:33:57Z" />
  </query-continue>
</api>