Questions on Wolfram SystemModeler, an environment for the modeling of systems with mechanical, electrical, thermal, chemical, biological, and other components, as well as combinations of different types of components.
Wolfram's System Modeler is an environment for the modeling and the simulation of cyber-physical systems(CPS) using the declarative modeling language Modelica (cf. Peter Fritzon (2011) - Modelica: A cyber-physical modeling language and the OpenModelica environment).
Questions with the tag system-modeler should be concerned specifically with the Wolfram System Modeler software and its interaction with the Wolfram Language.
Questions that are concerned with the system modeling functionality that as of Version 11.3.0 is part of the Wolfram Language should have the tag system-modeling instead. In some intersecting cases the assignment of both tags may be justified.