Definitions for "Hard Link"
A directory entry which maps a filename to an inode number. A file may have multiple names or hard links. The link count gives the number of names by which a file is accessible. Hard links do not allow multiple names for directories and do not allow multiple names in different filesystems.
a connection between a filename and an inode number kept in a directory file
a copy of a file's directory entry
Keywords:  hdf, space, exist, single, direct
A direct association between a name and the object where both exist in a single HDF5 address space.