Brasil NCE & IM Caixa Postal 2324 20001-970 Rio de Janeiro-Brasil mborges@nce.ufrj.br **Universidad de Chile Computer Science Department Casilla 2777 Santiago, Chile jpino@dcc.uchile.cl ***Fraunhofer FIT Schloss Birlinghoven Sankt Augustin – Germany 53754 carla.valle@fit.fraunhofer.de José...