You might find http://www.erights.org/elib/capability/ode/index.html http://www.erights.org/elib/capability/ode/index.html stimulating if you haven't seen it be

You might find http://www.erights.org/elib/capability/ode/index.html http://www.erights.org/elib/capability/ode/index.html stimulating if you haven't seen it before. It showed me that OO could be more elegant than I'd thought.