Provides mechanisms for establishing and navigating relationships to
superior and subordinate domains, as well as for creating and accessing
policies. The DomainManager has associated with it the policy
objects for a
particular domain. The domain manager also records the membership of
the domain and provides the means to add and remove members. The domain
manager is itself a member of a domain, possibly the domain it manages.
The domain manager provides mechanisms for establishing and navigating
relationships to superior and subordinate domains and
creating and accessing policies.