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>
    <alllinks galcontinue="BMT_10_2014/Seite_4|13192" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Hauptseite" />
      <page pageid="382" ns="0" title="LK Bio K13 2006-2008" />
      <page pageid="1324" ns="0" title="Hauptseite/Archiv Aktuelles" />
      <page pageid="9784" ns="2" title="Benutzer:Nils Dünninger" />
      <page pageid="10541" ns="10" title="Vorlage:Cat see also" />
      <page pageid="11398" ns="0" title="8e 2014 15" />
      <page pageid="12877" ns="0" title="9b 2016 17" />
      <page pageid="13192" ns="0" title="BMT 10 2014" />
    </pages>
  </query>
</api>