Stable release 1.0.

As described in the paper:

hPDB - Haskell library for processing atomic biomolecular structures in
Protein Data Bank format -- Michal Jan Gajda
BMC Research Notes.2013, 6:483.
DOI: 10.1186/1756-0500-6-483
URL: http://www.biomedcentral.com/1756-0500/6/483