If you have ever been in pain over namespaces in OWL ontologies and RDF data, you may want to read this year-old day-time television soap opera script, errr...ummmm... I mean, highly technical discussion about namespaces. My guess is that this pain will be with us for a long time. http://comments.gmane.org/gmane.org.w3c.semantic-web/11878 FWIW, gmane seems to be a rather nice syndication mechanism for mailing lists, making it quite a bit easier than looking in gnu-mailman archives to follow old threads . My only complaint is that you have to poke a bit to find the originals (whereupon you are grateful to gmane) Bob -- Robert A. Morris Emeritus Professor  of Computer Science UMASS-Boston 100 Morrissey Blvd Boston, MA 02125-3390 Associate, Harvard University Herbaria email: morris.bob@gmail.com web: http://efg.cs.umb.edu/ web: http://etaxonomy.org/mw/FilteredPush http://www.cs.umb.edu/~ram phone (+1) 857 222 7992 (mobile)