This Recommendation defines the extended runtime interface (TRI) package of TTCN 3. It defines a more efficient handling of software values by a version of TRI, that does not use binary encoded messages for the communication with the system under test (SUT), but uses the values as they are; meaning e.g. that software objects or serialized data can be passed directly between the SUT and the TTCN 3 Executable (TE).