What are the items to take into account when developing a DVE integration so that it will be future proof to use in SRM?
What preparations could already be done during the development of the connector to avoid changes when a function needs to be created?
To make it SRM proof having proper Relations and FK is Key for an easy Function creation in the future.
From the Function Definition prespective your entry point is a Table Pid.
If you only want to feature data on the DVE from the very same Table Pid, you are free to add as much Pids from the same table as you like.
If your Entry Point table will serve as a Parent Table to other data, make sure your Foreign Keys are up to speed in the child tables and your relations are also properly set up on your connector.
This way you will have your connector future proof and adding parameters from any table featured in the tabels relation chain(s) can be added without any connector adjustment.