Internal-Reference-Number {1 0 10161 13 8} DEFINITIONS ::= BEGIN Internal-Reference ::= SEQUENCE { requester-reference [0] IMPLICIT Internal-Reference-Type OPTIONAL, responder-reference [1] IMPLICIT Internal-Reference-Type OPTIONAL } Internal-Reference-Type ::= SEQUENCE { reference-authority [0] ILL-String OPTIONAL, -- identifier of the domain of the service-user internal-reference [1] ILL-String -- allocated by the service-user, semantics defined only in -- the domain of that service-user } END