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>
    <pages>
      <page pageid="60" ns="0" title="FAQ" />
      <page pageid="223" ns="0" title="Motion in Joy Installation" />
      <page pageid="383" ns="0" title="iPi Integration Add-on" />
      <page pageid="387" ns="0" title="Sample Video and Project - single depth sensor" />
      <page pageid="388" ns="0" title="Sample Video and Project - two depth sensors" />
      <page pageid="410" ns="0" title="Main Page/Multiple PS Eye Cameras" />
      <page pageid="479" ns="0" title="Multiple Depth Sensors vs Sony PS Eye Comparison" />
    </pages>
  </query>
</api>