Recommendation ITU-T Z.168 defines the mapping rules for CORBA IDL (as defined in chapter 3 in Draft Approved Specification ptc/06-05-01 (2006)) to TTCN-3 (as defined in Recommendation 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.