Files with hdf5 file extension can be found as data files in Hierarchical Data Format.
There is one other file type using
the HDF5 file extension!
.hdf5 - HDF5 data
HDF5 file extension - Hierarchical Data Format
What is hdf5 file? How to open hdf5 files?
File type specification:
The hdf5 file extension is one of the several suffixes used for files in the Hierarchical Data Format.
HDF is the name of a set of file formats and libraries designed to store and organize large amounts of numerical data originally developed at the National Center for Supercomputing Applications.
This hdf5 file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.