SYSML12 — Extending Ports to Support Non-flow Properties

There is a need to model a broader range of interfaces which extend beyond the current capability of standard ports and flow ports in SysML. One example is the physics based interfaces that are found in Modelica referred to as across and through variables. An example is in an electrical circuit where the interface can be defined in terms of the current and voltage parameters at each input and output node of a circuit. In Modelica, the interface between two components enables Kirchoffs Laws to be imposed on these interfaces such that the voltage on the on the connecting ports are equal, and the sum of the currents on the connecting ports sum to zero. SysML needs to be able to accommodate this type of interface more directly. One possible approach is to extend the concept of a Flow Specification to accommodate other types of properties, such as across and through variables, and not be limited to flow properties.

Disposition: See issue 11628 for resolution