Am 29.01.2015 um 10:59 schrieb Martin Koppenhoefer: > 2015-01-29 5:41 GMT+01:00 johnw <jo...@mac.com <mailto:jo...@mac.com>>: > >> if this is the proper term used for pipelines, then this would be >> the right one, >> >> Otherwise, =multi (like sports) would be the best. >> >> but you would not need such a tag, since it would be >> >> substance=gas >> substance:detailed=multiphase_gas >> >> if you keep it at two levels of detail (water, gas, oil, fuel, >> sewage, heat, coolant, etc), >> > I'd like to repeat once again that "substance" doesn't seem to be a nice > key descriptor for values like "gas", "fuel", "heat", as it refers to > physical matter/material and "heat" or "gas" or "fuel" in its actual > meaning aren't materials.
+1 but what do you suggest. Do we need a key for the state of matter or better use water_steam or hot_water or fluid_propane ? >> using the colon separator would keep from making additional tags >> (everything would be kept in the substance tagspace) - especially >> generic tags like fuel= water= gas= which might have uses elsewhere >> (like the water_tap discussion here earlier) or be confused for other >> uses (like not a subkey, but a straight key by itself), someone could >> stick fuel=unleaded_87 onto a gas station. Or does that already >> exist? Have a look at fuel=* [1]. Nice, we already have the value in key variant and a key=value variant with possibility to use semi-colon. At least, we should consider the same tags for the same substances/fuels. How about substance=wood_pallets. cu fly [1] https://wiki.openstreetmap.org/wiki/Key:fuel _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging