DefaultRoomVersion contains the room version that will, by default, be used to create new rooms on this server.

RoomVersion returns information about a specific room version.

RoomVersions returns a map of all known room versions to this server.

SupportedRoomVersion returns information about a specific room version.

SupportedRoomVersions returns a map of descriptions for room versions that are supported by this homeserver.

UnknownVersionError is caused when the room version is not known.

UnsupportedVersionError is caused when the room version is specifically marked as unsupported.