Dan,
Yeah, my [4] is at my threshold of tolerance for chaos in a diagram. I wanted a way to show the core of the FOAF spec in a picture, so tried (despite similar concerns to those mentioned in this thread) the style of putting domain/range directly in an instance-like style.
I think this is ok -- even if the diagram is really a little bit overloaded :-), but there is no danger of confusing this with actual RDF triples.
Best, Bernhard
