Anyone have an IWMS ERD?

[Wanderer]

I'm looking for an entity relationship diagram for a cafm software (don't much care if it's archibus or maximo or fm:systems etc). I need to explain to some non-software people how our data interconnects between modules, and an ERD (or ERModel) would be a simple way to do that... and, I'd rather not start from scratch if I don't have to.

Much appreciate any pointers. Thanks!