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>
    <alltransclusions gatcontinue="Footer|1413" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page" />
      <page pageid="1294" ns="0" title="Current events" />
      <page pageid="1319" ns="0" title="Chapter 1" />
      <page pageid="1329" ns="0" title="UN NGO community" />
      <page pageid="1339" ns="2" title="User:Grandpa Ruh" />
      <page pageid="1342" ns="0" title="Table of Contents" />
      <page pageid="1349" ns="0" title="Chapter 9, section 7" />
      <page pageid="1372" ns="0" title="NGO Committee on Education" />
      <page pageid="1373" ns="0" title="Free Summer School" />
      <page pageid="1494" ns="0" title="A Riqueza das Redes - CapĂ­tulo 7" />
    </pages>
  </query>
</api>