Topic: what is the <![CDATA ]> wraper in the RSS feeds for?

I think this is the most appropriate place to post this question.
I am writing a feed generation script for one of my sites, can anybody explain me what is the CDATA thing for?
Thanks in advance

Re: what is the <![CDATA ]> wraper in the RSS feeds for?

http://www.w3schools.com/xml/xml_cdata.asp