Hi Karl and all: NetCDF-4 compression and chunking are transparent to the user, and are compatible with the "classic data model".
I think we should be gathering experiences with the enhanced data model, and start a CF-2.X convention draft document that uses the enhanced model. It would also be a good time to remove deprecated features and in general not require backwards compatibility. Perhaps if there are 5-6 people we could start a working group to discuss. John On Wed, Sep 10, 2014 at 10:35 AM, Corey Bettenhausen < corey.bettenhau...@ssaihq.com> wrote: > Tim, > There was a discussion of this last year. See the archives: > http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2013/author.html > > Particularly, the thread "Towards recognizing and exploiting hierarchical > groups": > http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2013/056827.html > > Cheers, > -Corey > > On Sep 10, 2014, at 9:53 AM, Timothy Patterson wrote: > > > Is it correct to say that, although they don't explicitly state it, the > CF conventions (1.6 and the draft 1.7) restrict compliant netCDF products > to be either netCDF-3 or netCDF-4 in classic format? There are no > conventions for the enhanced features such as groups and user-defined types > like enumerated variables, and Section 2.2, as an example, bars the use of > unsigned integer variables or string variables (which are even stated not > to exist, again implying classic-model only). > > > > There are some features of the enhanced model we want to use for our > future datasets (such as groups) and some features which would make life > easier but could be worked around if it led to CF compliance (enumerated > types, unsigned integers, string types, etc.). Are there any plans to > introduce conventions for the use of these enhanced features at some point > in the future or would non-classic model datasets always be seen as > non-compliant? > > > > Thanks for your insights on this issue! > > > > Regards, > > > > Tim Patterson > > > > > > > > --------------------- > > > > Dr. Timothy Patterson > > Instrument Data Simulation > > Product Format Specification > > > > EUMETSAT, Eumetsatallee 1, D-64295 Darmstadt, Germany > > _______________________________________________ > > CF-metadata mailing list > > CF-metadata@cgd.ucar.edu > > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > > -- > Corey Bettenhausen > Science Systems and Applications, Inc > NASA Goddard Space Flight Center > 301 614 5383 > corey.bettenhau...@ssaihq.com > > _______________________________________________ > CF-metadata mailing list > CF-metadata@cgd.ucar.edu > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata >
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