Hello CF
> From: CF-metadata [[email protected]] on behalf of Jonathan
> Gregory [[email protected]]
> Yes, there are some standard names which imply string values, as Karl says.
> If the standard_name table says 1, that means the quantity is dimensionless,
> so it's also fine to omit the units, as Jim says.
I would like to raise question about this statement. Omitting the units and
stating that the units are '1' are two very different things;
dimensionless != no_unit
is an important statement which should be clear to data consumers and producers.
If the standard name table defines a canonical unit for a standard_name of '1'
then I expect this quantity to be dimensionless, with a unit of '1' or some
multiple there of.
If the standard name states that the canonical unit for a standard_name is ''
then I expect that quantity to have no unit stated.
Any deviation from this behaviour is a break with the conventions. I have code
which explicitly checks this for data sets.
Are people aware of examples of the pattern of use described by Jonathan, such
as a categorical quantities identified by a standard_name with a canonical unit
of '1'?
thank you
mark
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