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

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