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:Інфармацыя_пра_мову" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Bangla constructions.pdf" missing="" />
      <page ns="0" title="Ba:Ҡалып:Тел" missing="" />
      <page ns="0" title="Bergen" missing="" />
      <page pageid="2300" ns="0" title="Benefactive" />
      <page pageid="1600" ns="0" title="Benefactive SVCs in Mandarin Chinese" />
      <page pageid="82" ns="0" title="Bantu Bibliography" />
      <page pageid="405" ns="0" title="Bangla constructions log" />
      <page pageid="2621" ns="0" title="Bangla constructions log page" />
      <page pageid="380" ns="0" title="Bengali Constructions" />
      <page pageid="2703" ns="0" title="Bare Nominalizations in Norwegian" />
    </pages>
  </query>
</api>