Hello CF I understand that netCDF coordinate variables have to be strictly monotonic, and no-one wants to define what this means for the general case of strings; that is fine.
But I believe that I can create a CF auxiliary coordinate with string values without any concern. I am interested in whether there are cases in the standard names table which explicitly state that a certain standard name should have string values? How might this be stated? Do we have a canonical unit of 'no_unit' available? thank you mark
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