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Howdy all! I'm Ed. I've been hired here at UCAR to work on netCDF 4. I don't know who else is on this list, but I intend to use it to communicate with anyone who might be interested in the merger of HDF5 and netCDF. Russ, John, Robert, and I had a meeting here yesterday. From that meeting, and other sources, here is my understanding of the feature set of netCDF 4, in approximate order of priority. * All features of netCDF 3.6 * Use of HDF5 for file storage * Backward file-format compatibility * Backward API compatibility * Each var to have independent unlimited dimension * Anonymous dimensions * Bit packing * Chunking * Parallel I/O * (Unicode/ASCII) String data type * User-defined structs in data * Upgrades to ncgen/ncdump/NCL to reflect new features Is there anything missing? Anything that should be removed? Anything that should be reprioritized? Thanks! Ed