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="Carol_Bartz" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Biz Stone" missing="" />
      <page ns="0" title="Brain in a Vat" missing="" />
      <page ns="0" title="Brian Solis" missing="" />
      <page ns="0" title="Bruce Perens" missing="" />
      <page ns="0" title="Bruce Sterling" missing="" />
      <page ns="0" title="CamelCase" missing="" />
      <page pageid="1371" ns="0" title="BSD-Style License" />
      <page pageid="1370" ns="0" title="Bill Gates" />
      <page pageid="1372" ns="0" title="Buckminster Fuller" />
      <page pageid="1373" ns="0" title="C. Wright Mills" />
    </pages>
  </query>
</api>