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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20110223151839" timestamp="2011-02-23T15:18:39Z" ns="0" title="Reference Federation Help" />
        <page value="20110301182905" timestamp="2011-03-01T18:29:05Z" ns="0" title="IDP Core Software Module" />
        <page value="20110301183058" timestamp="2011-03-01T18:30:58Z" ns="0" title="Web Servlet Container" />
        <page value="20110301183436" timestamp="2011-03-01T18:34:36Z" ns="0" title="Web Single Sign-On System" />
        <page value="20110301183538" timestamp="2011-03-01T18:35:38Z" ns="0" title="Attribute Data Store" />
        <page value="20110301184059" timestamp="2011-03-01T18:40:59Z" ns="0" title="IDP Integration Points" />
        <page value="20110301193107" timestamp="2011-03-01T19:31:07Z" ns="0" title="IDP Components" />
        <page value="20110527154740" timestamp="2011-05-27T15:47:40Z" ns="0" title="Profiles and Techniques for Existing Resources" />
        <page value="20110527162044" timestamp="2011-05-27T16:20:44Z" ns="0" title="Reference Identity Provider" />
        <page value="20110527163818" timestamp="2011-05-27T16:38:18Z" ns="0" title="Reference Service Provider" />
      </results>
    </querypage>
  </query>
</api>