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="20051229131950" timestamp="2005-12-29T13:19:50Z" ns="0" title="SVG Coordinate Systems" />
        <page value="20060103165507" timestamp="2006-01-03T16:55:07Z" ns="0" title="Cppu" />
        <page value="20060221055738" timestamp="2006-02-21T05:57:38Z" ns="0" title="Short Term Marketing Plan" />
        <page value="20060221060524" timestamp="2006-02-21T06:05:24Z" ns="0" title="Marketing/SMP/Introduction" />
        <page value="20060310171731" timestamp="2006-03-10T17:17:31Z" ns="0" title="SMP Based To Do List" />
        <page value="20060312172421" timestamp="2006-03-12T17:24:21Z" ns="0" title="Ro.openoffice.org" />
        <page value="20060403102751" timestamp="2006-04-03T10:27:51Z" ns="0" title="Pa.openoffice.org" />
        <page value="20060403115021" timestamp="2006-04-03T11:50:21Z" ns="0" title="SVG Elliptic Arcs" />
        <page value="20060407142615" timestamp="2006-04-07T14:26:15Z" ns="0" title="Impress multiple display specification" />
        <page value="20060408080255" timestamp="2006-04-08T08:02:55Z" ns="0" title="TCM migration" />
      </results>
    </querypage>
  </query>
</api>