This Recommendation defines the mapping rules for CORBA IDL (as defined in chapter 3 in [OMG CORBA]) to TTCN-3 (as defined in [ITU-T Z.161]) to enable testing of CORBA-based systems. The principles of mapping CORBA IDL to TTCN-3 can be also used for the mapping of interface specification languages of other object-/component-based technologies. The specification of other mappings is outside the scope of this Recommendation. This Recommendation is technically aligned with [ETSI 201 873-8].