RT Conference Proceedings T1 On the Realization of TractsTool A1 Burgueño-Caballero, Lola A1 Wimmer, Manuel A1 Troya-Castilla, Javier A1 Vallecillo-Moreno, Antonio Jesús K1 Ingeniería del software AB Model transformations play an important role in Model-Driven Engineering (MDE), and as their size and complexity grow, there is an increasing need to count on tool support for testing their correctness. In this presentation, we introduce TractsTool, a tool for specifying and testing several different kinds of model transformations, e.g., model-to-model, model-to-text, and text-to-model transformations, based on contracts. We explain the main principles behind the tool, demonstrate some of its capabilities by a running example, and show how it is internally realized by using MDE techniques. In particular, we describe the transformation chain that is used to compute the test results. TractsTool with accompanying information is available at:http://atenea.lcc.uma.es/index.php/Main_Page/Resources/Tracts LK http://hdl.handle.net/10630/5680 UL http://hdl.handle.net/10630/5680 LA eng DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 19 ene 2026