Hi David,
my point is indeed that you should be able to put anything in them, so have a standards document which says that you can't put references to external variables in them would be a mistake .....
cheers,
Martin
________________________________
From: David Hassell [david.hassell at ncas.ac.uk]
Sent: 05 April 2017 11:35
To: Juckes, Martin (STFC,RAL,RALSP)
Cc: CF Metadata
Subject: Re: [CF-metadata] Overstated restriction on references to external variables in version 1.7
Hello Martin,
I don't quite see what you mean - such attributes are non-standardised, so you can already put anything you like in them, but software won't be able to do anything about it. Could you perhaps give a CDL example?
Many thanks,
David
On 5 April 2017 at 09:36, <martin.juckes at stfc.ac.uk<mailto:martin.juckes at stfc.ac.uk>> wrote:
Hello All,
Section 2.6.3, External Variables, of version 1.7 of the standard contains the statement that:"The only CF standard attribute which is allowed to refer to external variables is cell_measures."
I believe this is stronger than intended: it should be possible, for instance, to refer to external variables in the comment and history attributes, and any other free text attribute, or the comment part of the cell_methods string.
Should it say something along the lines of:
"The only attribute which is allowed to make a CF standard reference to external variables is cell_measures"?
regards,
Martin
_______________________________________________
CF-metadata mailing list
CF-metadata at cgd.ucar.edu<mailto:CF-metadata at cgd.ucar.edu>
http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
--
David Hassell
National Centre for Atmospheric Science
Department of Meteorology, University of Reading,
Earley Gate, PO Box 243, Reading RG6 6BB
Tel: +44 118 378 5613
http://www.met.reading.ac.uk/
Received on Wed Apr 05 2017 - 04:56:40 BST
