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="Letný_semester,_pravidlá,_INF" />
  </query-continue>
  <query>
    <pages>
      <page pageid="43" ns="0" title="DÚ1" />
      <page pageid="47" ns="0" title="DÚ2" />
      <page pageid="48" ns="0" title="Externý školiteľ" />
      <page pageid="44" ns="0" title="Jemný úvod k prezentáciám" />
      <page pageid="122" ns="0" title="Komentáre, DAV" />
      <page pageid="109" ns="0" title="Kontakt DAV" />
      <page pageid="64" ns="0" title="Kontrolné stretnutie" />
      <page pageid="119" ns="0" title="Kontrolné stretnutie 2" />
      <page pageid="17" ns="0" title="LaTeX pre bakalársku prácu" />
      <page pageid="118" ns="0" title="Letný semester, pravidlá, DAV" />
    </pages>
  </query>
</api>