2015-01-28 12:01 GMT+01:00 Warin <61sundow...@gmail.com>: > So for natural gas worked out to that basic level, as one example, that > would be > substance = gas > gas=fuel > fuel=natural_gas >
I believe this is pointlessly complicated and semantically incorrect, why not tag: substance=natural_gas > None of this colon/semicolon business that has got people so worked up :) > And it may reduce the errors of tagging things like > > substance=fuel > "fuel" is not a substance but describes a purpose (stuff to provide heat and/or power by combustion). You might see this as a common informal way to refer to gasoline / petrol but I wouldn't advocate something like this for a tagging scheme. substance = liquid > liquid=water > water=drinking (or potable?) > Other ideas? Kick them around guys.. brainstorm it. > substance=water drinkable=yes if you want the "liquid" information, use aggregate_state=liquid IMHO for pipelines it would be more interesting to tag the pressure and the inner diameter of the tube. Cheers, Martin
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