Mixed Quantitative and Qualitative Simulation in Modelica
François E. Cellier, Victorino Sanz · Linköping electronic conference proceedings · 2009
Whereas Modelica has been designed for modeling physical systems from first principles; some systems do not lend themselves to this kind of modeling; either because they are too poorly understood (no meta-knowledge is available yet) or because they are so complex that capturing their behavior in a detailed fashion would be a hopeless undertaking.