5.3.1.4 Parameter

factory_key
This parameter is an unbounded sequence of NameComponents (tuple of <id, kind> pairs) that uniquely identifies a factory object reference.
A NameComponent is defined as a having two members: an id and a kind, both of type string. The id field is used to represent the identity of factory object. The kind field is used to indicate how the value of the id field should be interpreted.
References to factory object registered using the operation TP::register_factory will have a kind value of “FactoryInterface”.