I think there are several problem with roles:
- Since ACS Site-wide admin (including system security)
rights are necessary to manage new users, it is not
easy to delegate it to volunteers who are willing to
help with the routine tasks.
- The roles and rights of Professor, Teaching/Class
Assistant, and Staff in dotLRN etc. are still very
unclear (which is also related to the the administrative
problem above).
The department - subject - class hierarchy, cannot be
properly translated, anyway, but must be abused since
it is not deep enough.