the s5 package is an example of an implementation of a derived (subclassed) package. The package s5 (
http://media.wu-wien.ac.at/download/s5-0.4.apm ) is derived from xowiki. See
http://www.openacs.org/forums/message-view?message_id=980065 for the original posting. i have not done any work to subclass package parameters.
