I hope Tim can prepare a brief workshop summary which includes the names and members of the subgroups and post it here. There is a nice paper which summarizes CDF, HDF, netCDF and PDB data formats: 'Software for Portable Scientific Data Management', Computers in Physics, V7, 1993, p304-308. There is a summary table of the features of each. I am in the process of re-typing this table so I can post to this group. Mark