You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <search>
      <p ns="0" title="Page inclusion" snippet="...tax to indicate that a page&#039;s contents should be those of some other page, &lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt; that the two pages are about the same exact thing.&#10;" size="1967" wordcount="314" timestamp="2009-12-28T21:05:23Z" />
    </search>
  </query>
</api>