SYSML2_ — Examples of Nested View Usages

Didn't know quite where to put this so filed against examples.

There are no examples of nested view usages, either within view usages or view definitions. As such it is not clear how view usage hierarchies work – in particular, how do nested view usages in view definitions establish their set of exposed elements.

I can't see anything in the syntax pages that shed any light on this either, and without more guidance I don't understand how to build view usage hierarchies.