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="Baldwin_Piano_Company" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="BCE Place" missing="" />
      <page ns="0" title="BTO" missing="" />
      <page ns="0" title="Baby boom" missing="" />
      <page ns="0" title="Bachelor of Arts" missing="" />
      <page ns="0" title="Bachman Turner Overdrive" missing="" />
      <page ns="0" title="Backbencher" missing="" />
      <page ns="0" title="Baddeck" missing="" />
      <page ns="0" title="Baffin Island" missing="" />
      <page ns="0" title="Baico Publishing" missing="" />
      <page pageid="2487" ns="0" title="Back to the Future" />
    </pages>
  </query>
</api>