This Recommendation provides the specification of the runtime interface for Testing and Test Control Notation version 3 (TTCN-3) test system implementations. The TTCN-3 runtime interface (TRI) provides a standardized adaptation for timing and communication of a test system to a particular processing platform and the system under test, respectively. This Recommendation defines the interface as a set of operations independent of target language.

The interface is defined to be compatible with the TTCN-3 standard. This Recommendation uses the Common Object Request Broker Architecture (CORBA) Interface Definition Language (IDL) to specify the TRI completely. Clauses 6, 7 and 8 of [ETSI ES 201 873-5 V4.8.1] present language mappings for this abstract specification to the target languages Java, ANSI C and C++. A summary of the IDL-based interface specification is provided in Annex A of [ETSI ES 201 873-5 V4.8.1].