Attribute select whether to use a persistent poa.
see CORBA documentation for more details.

Attribute used to set a poaname, otherwise it will
                                        default to the service name that this port runs under.

                                        poaname is used for setting certain policies, such
                                        as direct persistence and well-known port numbers in
                                        the orb config file.

Attribute used to set a serviceid
see CORBA documentation for more details.