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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="20091028135730" timestamp="2009-10-28T13:57:30Z" ns="0" title="Portal:vorbeugender Brandschutz" />
        <page value="20091106132026" timestamp="2009-11-06T13:20:26Z" ns="0" title="Definition Vorbeugender Brandschutz" />
        <page value="20091108164750" timestamp="2009-11-08T16:47:50Z" ns="0" title="Wärmemelder, punktförmig und linear" />
        <page value="20091201121256" timestamp="2009-12-01T12:12:56Z" ns="0" title="Versicherungsverzeichnis" />
        <page value="20091214115150" timestamp="2009-12-14T11:51:50Z" ns="0" title="Feuerwehrverzeichnis" />
        <page value="20091217090704" timestamp="2009-12-17T09:07:04Z" ns="0" title="Abwehrender Brandschutz" />
        <page value="20100212150442" timestamp="2010-02-12T15:04:42Z" ns="0" title="Optische Rauchmelder" />
        <page value="20100217150047" timestamp="2010-02-17T15:00:47Z" ns="0" title="Übertragungstechnik" />
        <page value="20100309094658" timestamp="2010-03-09T09:46:58Z" ns="0" title="Feuerwehr-Gebäudefunkbedienfeld" />
        <page value="20100310130843" timestamp="2010-03-10T13:08:43Z" ns="0" title="Feuerwehr-Schlüsselkasten" />
      </results>
    </querypage>
  </query>
</api>