At State of the Map Latam, @Robot8A pointed out an edge case that we don’t seem to be addressing on our map. Pheasant Island is a condominium between France and Spain that has formally changed hands every six months since 1902.
We haven’t mapped the island itself yet, but a boundary way running to the south is a member of 270 different boundary relations relating to the French and Spanish empires and their modern successors. The way to the north meanwhile isn’t part of any boundary relation.
Wikidata makes a show of nearly 500 country (P17) statements dating from 1856 to 2097. Should we do something similar with the French and Spanish boundaries? Or should we treat the changing administration as essentially a time-based operator:conditional=* and include the island in both countries, as with most condominiums?