Is HTML code inside the tag compliant in RSS 2.0?
You can decode < and > char to html code
< : <
> : >
The RSS 2.0 specification says that you can include HTML in the description element so long as you properly encode the markup.
You have two ways to do this:
Convert tags to escaped HTML entities:
<description>this is <b>bold</b></description>
Wrap the description content within a CDATA section:
<description><![CDATA[this is <b>bold</b>]]></description>