We're doing this in VIVO (www.vivoweb.org).   I developed service layer that integrates with VIVO that exposes the RDF as XML (or JSON) and it handles properties which include HTML (some of it is pretty ugly) that is used to render faculty profile pages like this:

http://chemistry.cornell.edu/faculty/detail.cfm?netid=hda1

All of the content under the navigation bar has been pulled out of VIVO as RDF.  The content under the Research area includes HTML markup in the RDF.  The link above is on a site using Coldfusion and there are other sites using Drupal calling my service layer to bring in content from VIVO.

-----Original Message-----
From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Ethan Gruber
Sent: Wednesday, January 11, 2012 2:37 PM
To: [log in to unmask]
Subject: [CODE4LIB] Embedding XHTML into RDF

Hi all,

Suppose I have RDF describing an object, and I would like some fairly free-form human generating description about the object (let's say within <dcterms:description>).  Is it semantically acceptable to have XHTML nested directly in this element or would this be considered uncouth for LOD?

Thanks,
Ethan