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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