Dear Nan I can't remember a reason why coordinate variables should not have comment, institution, source or references atts. Sect 2.6.2 just says "variables" can have them, not "data variables" specifically. I think it's just that we didn't suppose they'd be needed, but I agree, they are extra info like long_name, which is permitted for coord vars.
If there's not an obvious reason why Appendix A should be more restrictive than Sect 2.6.2, you could propose to amend App A with a defect ticket. Best wishes Jonathan _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
