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.bettenhausen at 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 at 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.bettenhausen at ssaihq.com
>
> _______________________________________________
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> CF-metadata at cgd.ucar.edu
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>
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