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="Lawson1.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Calculator_basic.png" timestamp="2009-05-27T12:12:46Z" url="http://hagio.org/wiki/images/c/c4/Calculator_basic.png" descriptionurl="http://hagio.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Calculator_basic.png" ns="6" title="ファイル:Calculator basic.png" />
      <img name="Calculator_programmer.png" timestamp="2009-05-27T12:13:33Z" url="http://hagio.org/wiki/images/e/e5/Calculator_programmer.png" descriptionurl="http://hagio.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Calculator_programmer.png" ns="6" title="ファイル:Calculator programmer.png" />
      <img name="Cannondale_quick5_2011_01.jpg" timestamp="2010-10-25T10:30:15Z" url="http://hagio.org/wiki/images/a/a3/Cannondale_quick5_2011_01.jpg" descriptionurl="http://hagio.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Cannondale_quick5_2011_01.jpg" ns="6" title="ファイル:Cannondale quick5 2011 01.jpg" />
      <img name="Cannondale_quick5_2011_02.jpg" timestamp="2010-10-25T10:31:11Z" url="http://hagio.org/wiki/images/9/90/Cannondale_quick5_2011_02.jpg" descriptionurl="http://hagio.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Cannondale_quick5_2011_02.jpg" ns="6" title="ファイル:Cannondale quick5 2011 02.jpg" />
      <img name="CircleK01.jpg" timestamp="2010-08-14T04:25:41Z" url="http://hagio.org/wiki/images/5/5f/CircleK01.jpg" descriptionurl="http://hagio.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:CircleK01.jpg" ns="6" title="ファイル:CircleK01.jpg" />
      <img name="Clock.png" timestamp="2009-04-30T10:42:16Z" url="http://hagio.org/wiki/images/3/35/Clock.png" descriptionurl="http://hagio.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Clock.png" ns="6" title="ファイル:Clock.png" />
      <img name="Cpupalette.png" timestamp="2009-04-12T15:37:11Z" url="http://hagio.org/wiki/images/2/25/Cpupalette.png" descriptionurl="http://hagio.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Cpupalette.png" ns="6" title="ファイル:Cpupalette.png" />
      <img name="Famima01.jpg" timestamp="2010-07-24T14:04:22Z" url="http://hagio.org/wiki/images/9/90/Famima01.jpg" descriptionurl="http://hagio.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Famima01.jpg" ns="6" title="ファイル:Famima01.jpg" />
      <img name="Famima02.jpg" timestamp="2010-07-24T14:04:34Z" url="http://hagio.org/wiki/images/c/c7/Famima02.jpg" descriptionurl="http://hagio.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Famima02.jpg" ns="6" title="ファイル:Famima02.jpg" />
      <img name="Hornet_001.jpg" timestamp="2012-09-05T15:16:17Z" url="http://hagio.org/wiki/images/0/0b/Hornet_001.jpg" descriptionurl="http://hagio.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Hornet_001.jpg" ns="6" title="ファイル:Hornet 001.jpg" />
    </allimages>
  </query>
</api>