HDF4 vs HDF5
HDF4 - Based on original 1988 version of HDF
- Backwardly compatible with all earlier versions
- 6 basic objects
- raster image, multidimensional array (SDS), palette, group (Vgroup), table (Vdata), annotation
HDF5 - First released in 1998
- New format(s) and library - not compatible with HDF4
- 2 basic objects