[bluGill]

UUIDs don't tell you that because when does changing a part make it a new part and thus a new UUID? Unless the users is naming all parts - but that isn't what UUIDs normally are and opens a different set of problems.

The problem is hard. I wish those working on it luck, but I don't have high confidence that it is solvable.

[rjsw]

There will be an algorithm defined for CAD systems to follow on when to keep or replace a UUID.