If i understood correctly, what you mean by “versioning” is the method of transition from one data scheme to another, that involves replaced actual data.
If i asked what would be the diference between this method called “versioning” and what this proposal tries, would you say that is a “anarchy method”? Meaning, is the will of the person that make the proposal that chooses is own method, making difficult to consistent in this process of transitioning?
If farm -> farmland was an example of a transition of a well used tag, how it was made? How the mappers and data consumers made the transition?