[Zope] Roles as members of other roles?

I've not kept up with all the different mechanisms for users and groups that are currently under development in the Portal Tookit and other activities. Do any of them support the idea of a role or group collectively being a member of some other role? For example, if there was a MarketingStaff role consisting of a number of users, then various other roles throughout a company website could be allocated to the MarketingStaff group collectively rather than having to be allocated individually to each member of this group. Hamish Lawson ____________________________________________________________ Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie