Instance
    host Host

    UniqueInstance host

RemoteObject
    instance InstanceId
    ident    LocalURI

    UniqueRemoteObject instance ident

RemoteTicket
    ticket  Int64
    ident   RemoteObjectId
    discuss RemoteDiscussionId

    UniqueRemoteTicket      ticket
    UniqueRemoteTicketIdent ident

Discussion

RemoteDiscussion
    ident   RemoteObjectId
    discuss DiscussionId

    UniqueRemoteDiscussionIdent ident
    UniqueRemoteDiscussion      discuss