// Because RSS doesn't allow child markup, we convert XHTML into an
// encoded string, just like HTML.
StringWriter sw = new StringWriter();
XmlWriter xw = new XmlWriter(sw);
xw.innerXml(xhtml.getBlob());
// At this point, sw contains the <xhtml:div> element.
w.simpleElement(Namespaces.rssNs, elementName, null, sw.toString());
break;