To add flow ports, right-click the object or class and
then select Ports > New
Flowport.
About this task
The method used for specifying the data
that is to be sent/received through the flow port depends upon the
type of flow port used - atomic or non-atomic. Non-atomic flow ports
can only be used if your model uses the SysML profile.
Atomic flow ports
Atomic flow ports can be
input or output flow ports, but
not bidirectional. To specify the flow direction, open the Features
window for the flow port and select the appropriate direction.