[Tagging] Request for comments on proposed tags for amenity=drinking_water

[Martin Koppenhoefer]

The proposed example value for the historic key does not seem
reasonable. (nrhp:1231313)
I suggest you have a look how the world heritage proposal suggests to
handle reference numbers:

http://wiki.openstreetmap.org/wiki/Proposed_features/heritage

heritage:operator=*		 see below. Multiple values can be concatenated
using the ; separator, from the highest to the lowest (internationnal,
nationnal, regional...)
ref:*=*		 the ref for the operator. In order to keep consistency
beetwen all refs, the ref should be tagged ref:* rather than *:ref.

cheers,
Martin