I have a C&SI partner who's customer is currently upgrading from 13x to 24x FD02. They are going from Engineering Central to UPS. In their current system they have custom attributes on the relationship between EC Parts and Spec Documents.

They would like to re-create this custom attributes between Physical Products and Specification Documents relationship. They would like to have this attribute available to be displayed in the XEN table as well.

What is the best way to achieve this that would be supported by us where when the customer would upgrade in the future, this wouldn't cause any issues?

Thanks!