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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="20110509184735" timestamp="2011-05-09T18:47:35Z" ns="0" title="Wiki-Schulung Teil II" />
        <page value="20110512123250" timestamp="2011-05-12T12:32:50Z" ns="0" title="Erlebnisbericht" />
        <page value="20110512125134" timestamp="2011-05-12T12:51:34Z" ns="0" title="Über das Projekt" />
        <page value="20110519090307" timestamp="2011-05-19T09:03:07Z" ns="0" title="Wiki-Schulung Teil I" />
        <page value="20110526153114" timestamp="2011-05-26T15:31:14Z" ns="0" title="Nadine &amp; Sven Hilight" />
        <page value="20110526154337" timestamp="2011-05-26T15:43:37Z" ns="0" title="Marco and Adrian: Highlight" />
        <page value="20110526154854" timestamp="2011-05-26T15:48:54Z" ns="0" title="Zaklady Opla" />
        <page value="20110526154956" timestamp="2011-05-26T15:49:56Z" ns="0" title="Sonia &amp; Kamil Silesia City Center" />
        <page value="20110604101112" timestamp="2011-06-04T10:11:12Z" ns="0" title="Aleksandra" />
        <page value="20110609072125" timestamp="2011-06-09T07:21:25Z" ns="0" title="Krakau: Zwiedzanie starowki" />
      </results>
    </querypage>
  </query>
</api>