ERM Diagram Covering iModel Schema

[sweetld]

Using the Bentley iModel Schema Editor there are a number of schemas, and it's difficult to follow the relationships between the Entities in the schema, as well as understand what the schemas are for.
It would be very useful to have an overall diagram of how they fit together, as well as the individual schemas themselves.
Is there something already available for this, and if not, is there something that could be shared?

[pmconne]

@ColinKerr got anything?