Hi -- thanks for asking! I'm especially proud of that part of the application because it took a lot of effort to get right ... it was actually the most difficult part to design and implement. In the end, I'm very happy with the result.

You can see a video demo of configuring and using Data Relationships in "Create an Application (Part 3)" here ...

https://www.youtube.com/watch?v=lQ_1FtwsB6A

Note: Links to videos "Part 1", "Part 2", and "Part 3" can be found at: https://www.dataspeeder.com/support

Does that help? If you had a more specific question about it, let me know and I'll try to elaborate (or simplify ;-).