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Re: 20051101:hdf5 file structure

Unidata Support <address@hidden> writes:

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> From: Jeff Whitaker <address@hidden>
> Subject: hdf5 file structure
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> Hi:  I need to create hdf5 files (using the hdf5 API, not netcdf4) that 
> will be readable by netCDF 4 clients.  Is there a document somewhere 
> that describes the structure of the HDF5 files produced by netCDF4?  I 
> found http://www.unidata.ucar.edu/software/netcdf/netcdf-4/arch.html, 
> but it seems a bit old - is it still relevant?  Are there any sample 
> netCDF 4 files available to look at?
>
> -Jeff
>
> -- 
> Jeffrey S. Whitaker         Phone  : (303)497-6313
> Meteorologist               FAX    : (303)497-6449
> NOAA/OAR/CDC  R/CDC1        Email  : address@hidden
> 325 Broadway                Office : Skaggs Research Cntr 1D-124
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Howdy Jeff!

There is no document which describes the rules, and we are not quite
clear yet on what the minimum set of rules will be.

At the moment, it is required (by netCDF-4) that you use the
dimension scale interface to make all dimensions shared dimensions,
and attach dimension scales to all your dataset dimensions.

All this is not due out in HDF5 until 1.8.0, but you can get the
development snapshots.

Otherwise, the datasets should all be in one of the netCDF-4 types
(which allows just about every kind of type, but not references.)

Finally, any groups used must be strictly hierarchical. That is, not
looping structure of groups.

Can you tell me why you are trying to produce files readable to
netCDF-4?

Thanks,

Ed
-- 
Ed Hartnett  -- address@hidden