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="20130320174555" timestamp="2013-03-20T17:45:55Z" ns="0" title="Kontakt" />
        <page value="20130322144518" timestamp="2013-03-22T14:45:18Z" ns="0" title="Pošta Děčín IX Teplická" />
        <page value="20130402080004" timestamp="2013-04-02T08:00:04Z" ns="0" title="Město Šluknov" />
        <page value="20130402080008" timestamp="2013-04-02T08:00:08Z" ns="0" title="Město Varnsdorf" />
        <page value="20130402080014" timestamp="2013-04-02T08:00:14Z" ns="0" title="Město Velký Šenov" />
        <page value="20130402090021" timestamp="2013-04-02T09:00:21Z" ns="0" title="Obec Dobkovice" />
        <page value="20130402090025" timestamp="2013-04-02T09:00:25Z" ns="0" title="Obec Dobrná" />
        <page value="20130402090029" timestamp="2013-04-02T09:00:29Z" ns="0" title="Obec Dolní Habartice" />
        <page value="20130402090403" timestamp="2013-04-02T09:04:03Z" ns="0" title="Obec Dolní Podluží" />
        <page value="20130403080036" timestamp="2013-04-03T08:00:36Z" ns="0" title="Obec Doubice" />
      </results>
    </querypage>
  </query>
</api>