[OSM-talk] License plan - what data would need deleting

[MP]

OK, so lets assume that some data would have to be deleted (hopefully
not lot of them, otherwise it would probably kill the project and
spawn some forks with "complete" cc-by-sa data). Where there is the
exact line between deleted and kept data is on another debate, but I
wonder the way how the data would be deleted:

- Would people know in advance what data are going to be
deleted/reverted, so they can perhaps delete and redraw them themself?
- If yes, how that would be done and how long before marking the data
and actual deletion?
- After deletion, would there be some marker like "there is something
deleted from here"/"this way was reverted" for people to see, so they
can improve the data again?
- Would there be some "log" summarizing what data was/are going to be
deleted from where after/before the deletion?

Martin