I've re-read the discussion, and propose this approach:
disused:oldkey = oldvalue For items that are gone and not coming back. Examples: locked gate, shop that has ceased business. disused = yes For items that are not presently in use, but could be renovated or fixed with great effort. Examples: train tracks with no trains, soccer field covered in weeds, ruined apartment building, flooded and moldy amusement park. operational_status={working/needs_repair/not_working} operational_status:note={free text} For items that are still intended to have their original function. Examples: drinking fountain clogged with sand, sticky gate needing repair, tourist attraction closed for repairs.
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