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="Beatrycze_Brandenburska" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Baltazar Erdmann Promnitz" missing="" />
      <page ns="0" title="Baltazar Promnitz" missing="" />
      <page ns="0" title="Baptyści" missing="" />
      <page ns="0" title="Barania Góra" missing="" />
      <page ns="0" title="Baranowice" missing="" />
      <page ns="0" title="Barbara Cieszyńska" missing="" />
      <page ns="0" title="Barbara Karniowska" missing="" />
      <page ns="0" title="Barthel Stein" missing="" />
      <page ns="0" title="Bazylika Najświętszej Maryi Panny w Piekarach Śląskich" missing="" />
      <page pageid="380" ns="0" title="Barok" />
    </pages>
  </query>
</api>