An Invocation on Nested Port Action is an invocation action that applies the «InvocationOnNestedPortAction» stereotype which extends the UML’s on Port property to support nested ports.
Note
You must specify both On Port and On Nested Port properties for the Invocation On Nested Port action. The final port from which signal is sent is considered as the On Port. The On Nested Port contains the nested structure to the final port.
On Port property is only available in All view mode.