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>
    <alltransclusions gatcontinue="Prettytable|2062" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1119" ns="0" title="Studium: Allgemeine Kompetenz" />
      <page pageid="1124" ns="0" title="Mathe:Klausuren/Abschluss 20.02.2004" />
      <page pageid="1125" ns="0" title="Klausur Mathe3 05.02.2004" />
      <page pageid="1135" ns="0" title="Prüfung Mathe 06.08.2001" />
      <page pageid="1139" ns="0" title="Mathe:Abschluss 2005-07-29 Ganter" />
      <page pageid="1142" ns="0" title="Datenbanken:Prüfung 2005.08.05 Lehner" />
      <page pageid="2053" ns="0" title="Mathe:TP2 2006-08-24 Brunner" />
      <page pageid="2060" ns="0" title="Betriebssysteme:Aufgaben V" />
      <page pageid="2061" ns="0" title="Betriebssysteme:Aufgaben H" />
      <page pageid="2080" ns="10" title="Vorlage:Löschantrag" />
    </pages>
  </query>
</api>