HDF5 is a data directory which contains examples of HDF version 5.0 files, the "hierarchical data format" for the management of scientific data.
HDF version 5.0 files typically have a file extension of ".h5" or ".hdf5".
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
You can go up one level to the DATA page.