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 <[email protected]> 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 [email protected] (12PM 06 Mar 15) > >> Date: Fri, 6 Mar 2015 12:02:29 +0000 >> From: [email protected] >> To: [email protected] >> 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 >> [email protected] >> 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: [email protected] > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata -- Dr. Richard P. Signell (508) 457-2229 USGS, 384 Woods Hole Rd. Woods Hole, MA 02543-1598 _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
