Hi Clifford,
We haven't locked anything down at this point, but it will likely be similar to what Terry shows in his book (brackets or bold vertical lines at the edges of the fact type and on the text of the object type). I'd probably do something that doesn't look exactly like a character (brackets have other meanings as well).
So, no, I can't give you a graphical representation at this point because I haven't mocked it up or given it extensive thought.
-Matt