Model Schemas - Visual Examples


Hi All, 

I am working through designing the model schema for Level 3.

However, I can not find any good visual examples of how they could look.

What should I include in the design? 

What is the most effective way to include dimensions and should key calculations be shown to illustrate how the data is flowing from one module to the next.

Would welcome any examples of model schemas that people feel are good examples of best practice in this area.