20260715-0 HDF HDF 2015-04-07 1990-01-01 HDF 2015-04-22 Hierarchical Data Format HDF is a set of file formats (HDF4, HDF5) designed to store and organize large amounts of numerical data. .hdf5 .he2 .he5 .hdf .h5 application/x-hdf .hdf4 .h4 application/x-hdf HDF false HDF 1990-01-01 HDF