I'm a big fan of Silverston and his UDM books and have been studying OfBiz extensively. I was wondering if anyone can explain why his entities with from/thru date use the from date instead of the thru date in the composite keys? It seems like you would want to enforce only one version is ever active at a time by uniquely indexing the thru date as null (or a magic end date, or infinity in Postgres).
I'd be very appreciative of any theory explanations on the use of from date instead of thru date? Brian
