pt.find("tag").each do |tag|
raise OSM::APIBadXMLError.new("relation", pt, "tag is missing key") if tag["k"].nil?
raise OSM::APIBadXMLError.new("relation", pt, "tag is missing value") if tag["v"].nil?
pt.find("tag").each do |tag|
raise OSM::APIBadXMLError.new("relation", pt, "tag is missing key") if tag["k"].nil?
raise OSM::APIBadXMLError.new("relation", pt, "tag is missing value") if tag["v"].nil?