Sven Hartmann John F. Roddick Conceptual Modelling 2004, First Asia-Pacific Conference on Conceptual Modelling (APCCM2004), Dunedin, New Zealand, January 18-22, 2004 APCCM CRPIT 31 Australian Computer Society 2004 1-920682-13-9 db/conf/apccm/apccm2004.html