David,
I looked at this a bit and I'm not sure that
http://cf-trac.llnl.gov/trac/ticket/76 actually captures this need, as
UGRID is intended to *extend* CF, rather than a stand-alone
alternative.
For situations like CF and UGRID, which *extends* CF, it would appear
from this guidance
(
http://www.unidata.ucar.edu/software/netcdf/conventions.html)
that the foward slash separator should be used:
Conventions = "CF-1.6/UGRID-0.9"
This is discussed more in github issue
(
https://github.com/ugrid-conventions/ugrid-conventions/issues/11#issuecomment-79157891)
-Rich
P.S. Chris also points out that the current CF-1.6 document
http://cfconventions.org/Data/cf-conventions/cf-conventions-1.6/build/cf-conventions.html
there is an unfortunate error/typo that says the convention should look like
Conventions = " CF-1.6 " (e.g. with spaces on either side of the quotes)
Happily, this is gone in the 1.7 version at:
http://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/build/cf-conventions.html
But perhaps it would be good to edit the CF-1.6 doc if that is indeed a typo.
On Fri, Mar 6, 2015 at 7:21 AM, David Hassell <d.c.hassell at reading.ac.uk> wrote:
> Hello Martin,
>
> Good news - this is covered by trac ticket #76 "More than one name in
> Conventions attribute" (http://cf-trac.llnl.gov/trac/ticket/76).
>
> This has been accepted and should be in 1.7 (if it wasn't already in
> 1.6?):
>
> It is possible for a netCDF file to adhere to more than one set of
> conventions, even when there is no inheritance relationship among
> the conventions. In this case, the value of the Conventions
> attribute may be a single text string containing a list of the
> convention names separated by blank space (recommended) or commas
> (if a convention name contains blanks). This is the Unidata
> recommended syntax from NetCDF Users Guide, Appendix B. If the
> string contains any commas, it is assumed to be a comma-separated
> list.
>
> For example:
>
> :Conventions = "CF-1.6 ACDD-1.0" ;
>
>
> All the best,
>
> David
>
> ---- Original message from martin.juckes at stfc.ac.uk (12PM 06 Mar 15)
>
>> Date: Fri, 6 Mar 2015 12:02:29 +0000
>> From: martin.juckes at stfc.ac.uk
>> To: cf-metadata at cgd.ucar.edu
>> Subject: [CF-metadata] Applying multiple conventions
>>
>> Hello,
>>
>> There is a proposal floating around to use the UGRID conventions for unstructured grids in CMIP6 data. One issue is that the CF Convention specifies a specific string for the "Conventions" and the UGRID convention specific a different specific string. Is there any chance of modifying CF to accept, e.g. Conventions = "CF-1.8, UGRID-0.9"?
>>
>> regards,
>> Martin
>> _______________________________________________
>> CF-metadata mailing list
>> CF-metadata at cgd.ucar.edu
>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>
>
> --
> David Hassell
> National Centre for Atmospheric Science (NCAS)
> Department of Meteorology, University of Reading,
> Earley Gate, PO Box 243,
> Reading RG6 6BB, U.K.
>
> Tel : +44 118 3785613
> E-mail: d.c.hassell at reading.ac.uk
> _______________________________________________
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--
Dr. Richard P. Signell (508) 457-2229
USGS, 384 Woods Hole Rd.
Woods Hole, MA 02543-1598
Received on Fri Mar 13 2015 - 11:59:37 GMT
