In the current CTM draft the types of occurrences, names, topics, and association roles can be given as embedded topics, but not the types of associations. Why is that? See production [51] in http://www.isotopicmaps.org/ctm/ctm.html#sec-assoc --Lars M. http://www.garshol.priv.no/blog/ http://www.garshol.priv.no/tmphoto/