digraph
{
	// LOGON PHASE
	User -> LogOn;
	LogOn -> StdUser;
	LogOn -> LibraryMgr;
	// USER CLASSES
	// - StdUser (unprivileged)
	StdUser -> CreateEditShow;
	StdUser -> PlayShow;
	StdUser -> ManageUserTracks;
	// - LibraryMgr (privileged)
	LibraryMgr -> CreateEditShow;
	LibraryMgr -> PlayShow;
	LibraryMgr -> ManageUserTracks;
	LibraryMgr -> ManageLibrary;
}