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="20110630060530|COST_FORSYS_Overview_WIKI_System.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="Forsys_CSTC_Journal_Article_2013-04-16_sg.docx" timestamp="2013-05-14T04:12:57Z" user="SeanGordon" url="http://www.forestdss.org/wiki/images/4/43/Forsys_CSTC_Journal_Article_2013-04-16_sg.docx" descriptionurl="http://www.forestdss.org/wiki/index.php?title=File:Forsys_CSTC_Journal_Article_2013-04-16_sg.docx" ns="6" title="File:Forsys CSTC Journal Article 2013-04-16 sg.docx" />
      <img name="Forsys_CSTC_Journal_Article_2013-04-16_sg.doc" timestamp="2013-05-14T04:11:03Z" user="SeanGordon" url="http://www.forestdss.org/wiki/images/6/63/Forsys_CSTC_Journal_Article_2013-04-16_sg.doc" descriptionurl="http://www.forestdss.org/wiki/index.php?title=File:Forsys_CSTC_Journal_Article_2013-04-16_sg.doc" ns="6" title="File:Forsys CSTC Journal Article 2013-04-16 sg.doc" />
      <img name="PortoMeetingSummary1.pdf" timestamp="2012-09-10T13:51:38Z" user="Alexmarques" url="http://www.forestdss.org/wiki/images/4/45/PortoMeetingSummary1.pdf" descriptionurl="http://www.forestdss.org/wiki/index.php?title=File:PortoMeetingSummary1.pdf" ns="6" title="File:PortoMeetingSummary1.pdf" />
      <img name="CoP_TG4.pdf" timestamp="2012-09-10T11:44:35Z" user="Alexmarques" url="http://www.forestdss.org/wiki/images/e/e1/CoP_TG4.pdf" descriptionurl="http://www.forestdss.org/wiki/index.php?title=File:CoP_TG4.pdf" ns="6" title="File:CoP TG4.pdf" />
      <img name="Copy_of_CRinWiki_TG3.pdf" timestamp="2012-09-10T11:44:09Z" user="Alexmarques" url="http://www.forestdss.org/wiki/images/4/4d/Copy_of_CRinWiki_TG3.pdf" descriptionurl="http://www.forestdss.org/wiki/index.php?title=File:Copy_of_CRinWiki_TG3.pdf" ns="6" title="File:Copy of CRinWiki TG3.pdf" />
      <img name="Copy_of_LessonsLearned_TG2.pdf" timestamp="2012-09-10T11:43:48Z" user="Alexmarques" url="http://www.forestdss.org/wiki/images/6/6a/Copy_of_LessonsLearned_TG2.pdf" descriptionurl="http://www.forestdss.org/wiki/index.php?title=File:Copy_of_LessonsLearned_TG2.pdf" ns="6" title="File:Copy of LessonsLearned TG2.pdf" />
      <img name="Queries_TG1.pdf" timestamp="2012-09-10T11:42:03Z" user="Alexmarques" url="http://www.forestdss.org/wiki/images/0/0e/Queries_TG1.pdf" descriptionurl="http://www.forestdss.org/wiki/index.php?title=File:Queries_TG1.pdf" ns="6" title="File:Queries TG1.pdf" />
      <img name="PortoAgenda.pdf" timestamp="2012-09-10T11:18:56Z" user="Alexmarques" url="http://www.forestdss.org/wiki/images/9/9e/PortoAgenda.pdf" descriptionurl="http://www.forestdss.org/wiki/index.php?title=File:PortoAgenda.pdf" ns="6" title="File:PortoAgenda.pdf" />
      <img name="PortoMeetingSummary.pdf" timestamp="2012-09-10T10:55:01Z" user="Alexmarques" url="http://www.forestdss.org/wiki/images/2/20/PortoMeetingSummary.pdf" descriptionurl="http://www.forestdss.org/wiki/index.php?title=File:PortoMeetingSummary.pdf" ns="6" title="File:PortoMeetingSummary.pdf" />
      <img name="CaseSelectionDmXObj.png" timestamp="2011-11-07T05:24:18Z" user="SeanGordon" url="http://www.forestdss.org/wiki/images/7/70/CaseSelectionDmXObj.png" descriptionurl="http://www.forestdss.org/wiki/index.php?title=File:CaseSelectionDmXObj.png" ns="6" title="File:CaseSelectionDmXObj.png" />
    </allimages>
  </query>
</api>