Accessorily, I believe there is a need for an equivalent of <dd> for <dfn>. <dfn> marks a term to define, but what is the marker for its definition?
"The paragraph, description list group, or section that contains the dfn element contains the definition for the term given by the contents of the dfn element."
-- http://www.whatwg.org/specs/web-apps/current-work/#the-dfn -- David Håsäther
