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="Be-x-old:Шаблён:Зноскі" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Ba:Ҡалып:Doc" missing="" />
      <page ns="0" title="Ba:Ҡалып:ПозКарта Польша" missing="" />
      <page ns="0" title="Bar:Vorlage:Anker" missing="" />
      <page ns="0" title="Bar:Vorlage:Dokumentation" missing="" />
      <page ns="0" title="Bar:Vorlage:Dokumentation/Dokuseitn" missing="" />
      <page ns="0" title="Bar:Vorlog:Dokumentation" missing="" />
      <page ns="0" title="Bat-smg:Šabluons:Country data Lėnkėjė" missing="" />
      <page ns="0" title="Bcl:Plantilya:Documentation" missing="" />
      <page ns="0" title="Be-x-old:Шаблён:Зноска" missing="" />
      <page pageid="503" ns="0" title="Badania podstawowe" />
    </pages>
  </query>
</api>