[OSM-legal-talk] Remapping - tags and practice

[Richard Fairhurst]

Hi all,

As the licence change draws on, we will inevitably be looking at remapping
objects touched by a decliner.

I'm interested in how we (as users) tackle something like this:
	user A (agrees) surveys and maps
	user B (agrees) refines geometry and tags
	user C (agrees) refines geometry and tags
	user D (declines) makes tag change, e.g. highway=unpaved->highway=track
	user E (agrees) refines geometry and (other) tags
	user F (agrees) refines geometry and (other) tags

(This is a fairly common situation where I map; talk-gb people may be able
to guess the context.)

Obviously it's trivial to construct an ODbL-ready version of the above;
simply back out user D's tag change. I'm interested, however, in how this
should be best done in practice.

Should I

a) create a new object which is the same as A+B+C+E+F, with a tag such as
"history=formerly way 8678374, user 891 removed"?

b) simply change the existing way to remove user D's contributions, and
add a tag (to the changeset or the way?) to say "user 891 removed"

c) or something else?

If b), then such a tag needs to be machine-parseable by, at least, the
eventual "remove decliners" script, and ideally information services such
as WTFE, odbl.de, etc. etc... so we probably need to agree on what it is.

Any thoughts?

cheers
Richard