Also if someone by some miracle is able to come up with a univocal hierarchy for a usecase or organization - that may even work throughout time and evolving sit

Also if someone by some miracle is able to come up with a univocal hierarchy for a usecase or organization - that may even work throughout time and evolving situation and conditions - then collaborating with an other field or organization will have collisions or discrepancies in taxonomy and a hopeless confusion of category number mapping.