The only relationships you need in the Data file are those used in order for a calculation field, validation calculation or auto-entered calculation to evaluate correctly.
Any relationships used at the layout level-such as the relationship needed to add a portal to a layout or a conditional value list, do not need to exist in the data file.
This is likely to result in a very simple set of Table occurrences and relationships in the Data file in most FileMaker Solutions.
BTW sorry for not providing closure about my last question on relationships.
I did go back and do some research and part of a video course that I needed and am feeling more solid.