I think I’ve figured out how I might be able to quickly implement the Familysearch File merging. I want to avoid any new buttons or options right now. So what seems best is to try is to use the AFN (Ancestral File Number) tags. Any individuals in all GEDCOMs loaded into Behold with the same AFN tag will be AUTOMATICALLY treated as the same person in the Everything report, and nothing need be done by the user to make it happen. It should be pretty slick.
I’ll have to add and index the AFN as a new data field. Then checking the links and combining the data may be a bit tricky. Finally I’ll have to see what the combined data looks like in the Everything Report, and do what’s necessary to make it look nice.