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="Bobcat_Excavator.jpg" timestamp="2009-07-01T16:52:46Z" url="http://openluna.org/wiki/images/1/1f/Bobcat_Excavator.jpg" descriptionurl="http://openluna.org/wiki/index.php?title=File:Bobcat_Excavator.jpg" ns="6" title="File:Bobcat Excavator.jpg" />
      <img name="COLORIZED_FLR_PLAN.jpg" timestamp="2009-05-27T05:31:48Z" url="http://openluna.org/wiki/images/1/1b/COLORIZED_FLR_PLAN.jpg" descriptionurl="http://openluna.org/wiki/index.php?title=File:COLORIZED_FLR_PLAN.jpg" ns="6" title="File:COLORIZED FLR PLAN.jpg" />
      <img name="CSS_Analog_Suitsa.pdf" timestamp="2009-12-14T05:19:53Z" url="http://openluna.org/wiki/images/7/71/CSS_Analog_Suitsa.pdf" descriptionurl="http://openluna.org/wiki/index.php?title=File:CSS_Analog_Suitsa.pdf" ns="6" title="File:CSS Analog Suitsa.pdf" />
      <img name="Chlorofyll-Sun-spectrum.gif" timestamp="2013-12-26T13:37:23Z" url="http://openluna.org/wiki/images/f/ff/Chlorofyll-Sun-spectrum.gif" descriptionurl="http://openluna.org/wiki/index.php?title=File:Chlorofyll-Sun-spectrum.gif" ns="6" title="File:Chlorofyll-Sun-spectrum.gif" />
      <img name="Chlorophyll-led-spectrum-combined.png" timestamp="2013-12-26T14:33:33Z" url="http://openluna.org/wiki/images/e/e4/Chlorophyll-led-spectrum-combined.png" descriptionurl="http://openluna.org/wiki/index.php?title=File:Chlorophyll-led-spectrum-combined.png" ns="6" title="File:Chlorophyll-led-spectrum-combined.png" />
      <img name="Chlorophyll.jpg" timestamp="2013-12-26T03:53:47Z" url="http://openluna.org/wiki/images/6/65/Chlorophyll.jpg" descriptionurl="http://openluna.org/wiki/index.php?title=File:Chlorophyll.jpg" ns="6" title="File:Chlorophyll.jpg" />
      <img name="Complete_suit.jpg" timestamp="2009-02-09T05:45:18Z" url="http://openluna.org/wiki/images/7/76/Complete_suit.jpg" descriptionurl="http://openluna.org/wiki/index.php?title=File:Complete_suit.jpg" ns="6" title="File:Complete suit.jpg" />
      <img name="CoperCrater.jpg" timestamp="2009-07-04T21:29:25Z" url="http://openluna.org/wiki/images/d/d5/CoperCrater.jpg" descriptionurl="http://openluna.org/wiki/index.php?title=File:CoperCrater.jpg" ns="6" title="File:CoperCrater.jpg" />
      <img name="CoperCrater2.gif" timestamp="2009-07-04T21:46:37Z" url="http://openluna.org/wiki/images/f/f7/CoperCrater2.gif" descriptionurl="http://openluna.org/wiki/index.php?title=File:CoperCrater2.gif" ns="6" title="File:CoperCrater2.gif" />
      <img name="D-LBioPhoto.jpg" timestamp="2008-07-29T04:44:44Z" url="http://openluna.org/wiki/images/d/d5/D-LBioPhoto.jpg" descriptionurl="http://openluna.org/wiki/index.php?title=File:D-LBioPhoto.jpg" ns="6" title="File:D-LBioPhoto.jpg" />
    </allimages>
  </query>
  <query-continue>
    <allimages aicontinue="Dust_Reduction_Layout.jpg" />
  </query-continue>
</api>