Hierarchical Data Format: Difference between revisions

Revision as of 20:54, 21 September 2020

Revision as of 18:05, 24 January 2021

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| owner = The HDF Group

| released =

| latest release version = 5-1.10.7<ref>{{cite web|url=https://support.hdfgroup.org/ftp/HDF5/releases/hdf5-1.10/hdf5-1.10.7/src/hdf5-1.10.7-RELEASE.txt|title=HDF5 version 1.10.7 released on 2020-09-16|accessdateaccess-date=16 Sep 2020}}</ref>

| latest release date = {{Start date and age|2020|09|16}}

| genre = [[Scientific data format]]

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==Early history==

The quest for a portable scientific data format, originally dubbed AEHOO (All Encompassing Hierarchical Object Oriented format) began in 1987 by the Graphics Foundations Task Force (GFTF) at the National Center for Supercomputing Applications (NCSA). NSF grants received in 1990 and 1992 were important to the project. Around this time NASA investigated 15 different file formats for use in the Earth Observing System (EOS) project. After a two-year review process, HDF was selected as the standard data and information system.<ref>{{cite web|url=http://www.hdfgroup.org/about/history.html|title=History of HDF Group| accessdateaccess-date=15 July 2014}}</ref>

==HDF4==

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Criticism of HDF5 follows from its monolithic design and lengthy specification.

*HDF5 does not enforce the use of [[UTF-8]], so client applications may be expecting ASCII in most places.

*Dataset data cannot be freed in a file without generating a file copy using an external tool (h5repack).<ref>{{cite web|last1=Rossant|first1=Cyrille|title=Moving away from HDF5|url=http://cyrille.rossant.net/moving-away-hdf5/|website=cyrille.rossant.net|accessdateaccess-date=21 April 2016}}</ref>

==Interfaces==