OSM Page: http://wiki.openstreetmap.org/wiki/Map_Features#Name
See also lake_poly. Question - do we need a tag to differentiate between LINZ lakes and ponds?
HB: if pond_use=hydroelectric then landuse=reservoir
anything similar for ox ponds and sewage?
RP: the wiki suggests natural=water, which is clearly ridiculous as these are not natural. i would suggest creating landuse=pond, documenting it, and directly copying the pond_use tag. new tag created.
Earmarked layer to export using reversed ways.
HB: I agree with using landuse=pond. Some of these contain oil, industrial waste, and sewage. natural=water doesn't fit. Added sport=ice_skating.