A security policy process which provides role-based permissions for hierarchically organized system resources such as domains, clusters, application servers, and resources, as well as topic structures for messaging services. Groups of permissions are assigned to roles, and each user is assigned a role...http://www.google.com.hk/patents/US6950825?utm_source=gb-gplus-share專利 US6950825 - Fine grained role-based access to system resources
