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>
    <querypage name="Ancientpages">
      <results>
        <page value="20080703170315" timestamp="2008-07-03T17:03:15Z" ns="0" title="Meeting Notes" />
        <page value="20080722184649" timestamp="2008-07-22T18:46:49Z" ns="0" title="Questions" />
        <page value="20080722193734" timestamp="2008-07-22T19:37:34Z" ns="0" title="Existing Ontologies" />
        <page value="20080722193754" timestamp="2008-07-22T19:37:54Z" ns="0" title="New page" />
        <page value="20080806183257" timestamp="2008-08-06T18:32:57Z" ns="0" title="Milestones" />
        <page value="20090116220456" timestamp="2009-01-16T22:04:56Z" ns="0" title="Definitions" />
        <page value="20090206172657" timestamp="2009-02-06T17:26:57Z" ns="0" title="Development Notes" />
        <page value="20091030151215" timestamp="2009-10-30T15:12:15Z" ns="0" title="Influenza Ontology Related Documents" />
        <page value="20101022231651" timestamp="2010-10-22T23:16:51Z" ns="0" title="Main Page" />
      </results>
    </querypage>
  </query>
</api>