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="BOSTON_(Light_Blue)_-_(New_York_(Navy),_Zurich_(Blue)_&amp;_Seoul_(Torquoise)).jpg" timestamp="2012-07-09T08:46:34Z" url="http://wiki.zyen.info/images/a/a9/BOSTON_%28Light_Blue%29_-_%28New_York_%28Navy%29%2C_Zurich_%28Blue%29_%26_Seoul_%28Torquoise%29%29.jpg" descriptionurl="http://wiki.zyen.info/index.php?title=File:BOSTON_(Light_Blue)_-_(New_York_(Navy),_Zurich_(Blue)_%26_Seoul_(Torquoise)).jpg" ns="6" title="File:BOSTON (Light Blue) - (New York (Navy), Zurich (Blue) &amp; Seoul (Torquoise)).jpg" />
      <img name="BetterCC.jpg" timestamp="2011-12-06T14:29:03Z" url="http://wiki.zyen.info/images/7/71/BetterCC.jpg" descriptionurl="http://wiki.zyen.info/index.php?title=File:BetterCC.jpg" ns="6" title="File:BetterCC.jpg" />
      <img name="CAPM.jpg" timestamp="2011-12-06T14:38:47Z" url="http://wiki.zyen.info/images/9/98/CAPM.jpg" descriptionurl="http://wiki.zyen.info/index.php?title=File:CAPM.jpg" ns="6" title="File:CAPM.jpg" />
      <img name="CHICAGO(Green).png" timestamp="2012-07-06T16:48:17Z" url="http://wiki.zyen.info/images/5/56/CHICAGO%28Green%29.png" descriptionurl="http://wiki.zyen.info/index.php?title=File:CHICAGO(Green).png" ns="6" title="File:CHICAGO(Green).png" />
      <img name="Cinema2.jpg" timestamp="2011-12-06T14:42:16Z" url="http://wiki.zyen.info/images/6/66/Cinema2.jpg" descriptionurl="http://wiki.zyen.info/index.php?title=File:Cinema2.jpg" ns="6" title="File:Cinema2.jpg" />
      <img name="Coin.jpg" timestamp="2012-06-27T09:26:42Z" url="http://wiki.zyen.info/images/c/ce/Coin.jpg" descriptionurl="http://wiki.zyen.info/index.php?title=File:Coin.jpg" ns="6" title="File:Coin.jpg" />
      <img name="CostTonChart.png" timestamp="2012-07-02T10:50:12Z" url="http://wiki.zyen.info/images/d/d4/CostTonChart.png" descriptionurl="http://wiki.zyen.info/index.php?title=File:CostTonChart.png" ns="6" title="File:CostTonChart.png" />
      <img name="EXAMPLE_Emissions_Calculator_-_Processing_and_Manufacturing.png" timestamp="2012-07-02T11:20:46Z" url="http://wiki.zyen.info/images/2/26/EXAMPLE_Emissions_Calculator_-_Processing_and_Manufacturing.png" descriptionurl="http://wiki.zyen.info/index.php?title=File:EXAMPLE_Emissions_Calculator_-_Processing_and_Manufacturing.png" ns="6" title="File:EXAMPLE Emissions Calculator - Processing and Manufacturing.png" />
      <img name="EXTZY_logo.png" timestamp="2012-06-29T15:48:13Z" url="http://wiki.zyen.info/images/a/ae/EXTZY_logo.png" descriptionurl="http://wiki.zyen.info/index.php?title=File:EXTZY_logo.png" ns="6" title="File:EXTZY logo.png" />
      <img name="ElecPricesChart.png" timestamp="2012-07-02T10:50:56Z" url="http://wiki.zyen.info/images/e/e9/ElecPricesChart.png" descriptionurl="http://wiki.zyen.info/index.php?title=File:ElecPricesChart.png" ns="6" title="File:ElecPricesChart.png" />
    </allimages>
  </query>
  <query-continue>
    <allimages aicontinue="Extzy_graph.jpg" />
  </query-continue>
</api>