Dear David Thanks for this proposal, which I support in its current form, with some minor points:
* Maybe Section 5 should be renamed "Coordinate systems _and domain_" to recognise this new construct. * I think the presence of a `dimensions` attribute can be taken as defining the variable as a domain variable rather than a data variable - is that right? If so, and if it's not stated, I think it should be. Maybe also it should not be allowed to have a variable to have both dimensions and a `dimensions` attribute, to avoid confusion. * A scalar _data_ variable has only one data value. A domain variable also has one data value (you can't have a netCDF variable with no data values). Is there really a need to allow domain variables for scalar domains, with the possibly surprising empty `dimensions` attribute? * You say, "It is of arbitrary type since it contains no data." I think it would be clearer to say e.g., "The variable should be a scalar (i.e. it has no dimensions) of arbitrary type, and the value of its single element is immaterial." * The conformance document would be more future-proof if you didn't explicitly list the attributes which aren't recommended, and refer instead to Appendix A. * I find the sentence describing this attributes as rather hard to understand. It says > It is recommended that a domain variable does not have any other attributes > that are also used to directly describe data values, defined in > [attribute-appendix] as those attributes that are used for non-coordinate > data which also do not have domain variable nor global use. for which would suggest > It is recommended that a domain variable does not have any of the attributes > marked in Appendix A as applicable to data variables except those which are > also marked as applicable to domain variables. * Typo in "blank separated list of the dimensions names". Jonathan -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/cf-convention/cf-conventions/issues/301#issuecomment-698387979 This list forwards relevant notifications from Github. It is distinct from [email protected], although if you do nothing, a subscription to the UCAR list will result in a subscription to this list. To unsubscribe from this list only, send a message to [email protected].
