On the Design of the new Testing Language TTCN-3

This paper gives an overview of the main concepts and features of the new testing language TTCN version 3 (TTCN-3). TTCN-3 is a complete new testing language built from a textual core notation on which a number of different presentation formats are possible. This makes TTCN-3 quite universal and application independent. One of the standardised presentation formats is based on the tree and tabular format from previous TTCN versions and another standardised presentation format is based on MSCs. TTCN-3 is a modular language and has a similar look and feel to a typical programming language. However, in addition to the typical programming constructs it contains all the important features necessary to specify test suites.