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="20140209145735" timestamp="2014-02-09T14:57:35Z" ns="0" title="Old Main Page" />
        <page value="20140216151133" timestamp="2014-02-16T15:11:33Z" ns="0" title="Business Architecture" />
        <page value="20140216191407" timestamp="2014-02-16T19:14:07Z" ns="0" title="Technology Architecture" />
        <page value="20140226185009" timestamp="2014-02-26T18:50:09Z" ns="0" title="Platform In memory data grid" />
        <page value="20140226185032" timestamp="2014-02-26T18:50:32Z" ns="0" title="Platform UI framework" />
        <page value="20140302140305" timestamp="2014-03-02T14:03:05Z" ns="0" title="Platform Cloud" />
        <page value="20140302142000" timestamp="2014-03-02T14:20:00Z" ns="0" title="Platform Messaging" />
        <page value="20140424080616" timestamp="2014-04-24T08:06:16Z" ns="0" title="Platform NewSQL" />
        <page value="20140429184812" timestamp="2014-04-29T18:48:12Z" ns="0" title="Categories" />
        <page value="20140430115930" timestamp="2014-04-30T11:59:30Z" ns="0" title="Production deployment" />
      </results>
    </querypage>
  </query>
</api>