On Fri, 28 Mar 2003 09:43:14 +0000 Axel Simon <A.Simon@ukc.ac.uk> wrote: > > d) setting a property and getting a result also: e) ability to watch and filter the changes made to attributes (implementing this as a derived feature would allow bypassing the filters) f) atomical modification of attributes (like modifyMVar) g) default values for unspecified attributes V.