As for newcomers, I think editors like iD should hide the intricacies of the tagging system anyway. If you click "drinking water" it puts "amenity=drinking_water". But then it offers you all types of drinking water, like "a tap, a spring, bottled water in a vending machine, a hose, a well" and if you choose "a tap" it puts man_made=water_tap + drinking_water=yes.
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