How (and why) to include an xhtml:body in a Radio UserLand RSS feed

The subject of the post is xhtml is RSS feeds but the meat of the post is producting valid XHTML in a weblog. This is a subject I have been interested in for several months. It really is a couple of subjects which revolve around creating XHTML in Radio. The MSHTML editor in the IE browser is at the core of the problem. It is easy to use but it creates non-xhtml html code in wyswig mode and their is no way to modify its behavior. Htmlarea is a partial solution. This post talks about using TIDY to transform a post to XHTML. Everything is migrating to a lightweight wyswig editor that produces valid xhtml.