1846 HDF 1-4 NCSA Hierarchical Data Format Dataset HDF is a data model, library, and file format for storing and managing data. 1 Digital Preservation Department / The National Archives 11 Apr 2017 11 Apr 2017 fmt/1041 PUID hdf File extension h4 File extension 1400 HDF 1-4 BOF: (magic) 0x0E031301 https://support.hdfgroup.org/release4/doc/Dspec_html/DS.pdf 1 Absolute from BOF 0 0 0E031301