You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20070608100010" timestamp="2007-06-08T10:00:10Z" ns="0" title="Ivan Albetkov" />
        <page value="20070609233639" timestamp="2007-06-09T23:36:39Z" ns="0" title="Index.php/Talk:Main Page" />
        <page value="20070612160727" timestamp="2007-06-12T16:07:27Z" ns="0" title="Video Switcher change log" />
        <page value="20070614153535" timestamp="2007-06-14T15:35:35Z" ns="0" title="MultiGraph Sink/Source uses" />
        <page value="20070619215243" timestamp="2007-06-19T21:52:43Z" ns="0" title="Phpbb/phpbb2/index.php" />
        <page value="20070724085420" timestamp="2007-07-24T08:54:20Z" ns="0" title="GraphEdit" />
        <page value="20070725033702" timestamp="2007-07-25T03:37:02Z" ns="0" title="Merit" />
        <page value="20070725035744" timestamp="2007-07-25T03:57:44Z" ns="0" title="IBaseFilter" />
        <page value="20070726031120" timestamp="2007-07-26T03:11:20Z" ns="0" title="SomeAudioLevelInterface::AdviseNotify" />
        <page value="20070727060528" timestamp="2007-07-27T06:05:28Z" ns="0" title="WMV Streaming Sample Application" />
      </results>
    </querypage>
  </query>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
</api>