Modelling platform with multiple representation formalism

Because every description formalism has advantages and disadvantages, a modelling platform for ODE/DAE systems allowing several formalisms would be required. MS1 is such a program and is described in this paper. Its development will start in August 1991 and will last three years. MS1 is based on an internal normalized formalism that is actually a mere topological representation of mathematical equation sets. we call that formalism information networks . computational causality is assigned after subsystem assembly and determines the assignment form to be used in each specific case. The program structure is designed so that it is easy to add a new input formalism - i.e. a description language - or a new output formalism - i.e. to address another solver.