I’m wondering if I have a ternary relationship situation here. Here are my classes;
Company (Role = owner of a coal mine)
Permit (Sanctions development operations of the company at a coal mine)
Here’s what I think it should look like;
Mulitple companies could own a mine over time (never overlapping terms). A permit for a mine is ammended when ownership changes.
A company may own a mine but there may not be a permit to
sanction development operations.
So any thoughts?