This proposal wants to establish the key opened=. Similar to the key locked=, opened=* describes whether an object that can be opened or closed is usually opened. This applies to objects such as gates (e.g. barrier=) and especially doors (door=). Additionally, we propose to reuse opening=* to determine the clearance width of an object tagged with opened=partial.
https://wiki.openstreetmap.org/wiki/Proposal:Key:opened%3D
Please discuss this proposal on its Wiki Talk page.