The equivalent diagram using the non-rectangle notation looks like this:
I think that this diagram is easier to read than the one above. Apart from the disappointing visual pun of the ‘role (roll)’, the other two bits of notation seem sensible: the Business Actor looks like a person ,and “collaboration” as of two overlapping circles seems sensible.
I realize that in taking this view, I’m making myself into a “Mickey-mouse”, child-like modeller. Gerben’s book (Mastering Archimate) comes out really, really strongly against this notation style, and in favour of the simple rectangle:
“In my view, these forms are for children, not grown-ups..” and suggests that if I want to use this style, I should go the whole way and “..create a funny drawing with Greek columns, jumping dogs...” (you see, Gerben – I really DID read your book..:-) )