%0 Conference Proceedings %F Jard-Jeron-IDPT2002 %A Jard, C. %A Jéron, T. %T TGV: theory, principles and algorithms %B The Sixth World Conference on Integrated Design & Process Technology (IDPT'02) %C Pasadena, California, USA %X This paper presents the TGV tool allowing the automatic synthesis of conformance test cases from a formal specification of a reactive system. TGV has been developped by Irisa Rennes and Verimag Grenoble, with the support of the Vasy team of Inria Rhônes-Alpes. The paper describes the main elements of the underlying testing theory, based on a model of transitions system which distinguishes inputs, outputs and internal actions, and based on the concept of conformance relation. The principles of the test synthesis process are explained as well as the main algorithms. We then describe the main characteristics of the TGV tool. As a conclusion, we describe some on going works in test synthesis %U http://www.irisa.fr/vertecs/Publis/Ps/2002-IDPT.ps.gz %8 June %D 2002