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>
    <search>
      <p ns="0" title="Freeplane Doc" snippet="...moment. To help you pick the sections are color coded, with the following &lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt;:&#10;...uld be used for better  organizing information and better communicating &lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt;.&#10;" size="76862" wordcount="12482" timestamp="2015-09-11T20:46:40Z" />
      <p ns="0" title="Intelligence" snippet="...], especially to [[understand]] [[principle]]s, [[truth]]s, [[fact]]s or [[&lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt;]]s, [[acquire]] [[knowledge]], and [[apply]] it to [[practice]]; the [[abil&#10;# [[&lt;span class=&#039;searchmatch&#039;&gt;meaning&lt;/span&gt;]]&#10;" size="121521" wordcount="18368" timestamp="2016-07-05T13:20:06Z" />
    </search>
  </query>
</api>