[Tagging] Features underwater (inside reservoirs)

Hi everyone! We have been looking for how to tag the ruins of constructions (buildings, bridges or roads) that are inside some reservoirs. Although they generally remain underwater, but in times of drought, when the reservoir level drops low enough, they can be visited on foot. Like this [1] On

[Tagging] Multiple values in isced:level

Hi! I would like to know how to indicate that a school offers several educational levels. I've been seeing the isced: level tag, which is that I think to use, but I have a question about how to separate multiple values. I have looked in taginfo and approximately in 15000 cases the semicolon (;)