HermiT is a conformant OWL 2 DL reasoner that uses the direct semantics. It supports all OWL2 DL constructs and the datatypes required by the OWL 2 specification. HermiT is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See the GNU General Public License for more details. A copy of the GNU General Public License has been included with this distribution in the file `license.txt`. An online version is available at . More information about HermiT and additional licensing information is available at , or by contacting Boris Motik or Ian Horrocks at the Oxford University Computing Laboratory. HermiT uses the following libraries in unmodified form: 1) dk.brics.automaton, Copyright (C) 2001-2009 Anders Moeller http://www.brics.dk/automaton/ released under BSD license, see dk.brics.automaton.COPYING and dk.brics.automaton.README in project/lib 2) JAutomata, http://jautomata.sourceforge.net/ released under LGPL 2.1, see jautomata.LICENSE in project/lib 3) The OWL API, http://owlapi.sourceforge.net released under LGPL 3.0, see owlapi.LICENSE in project/lib The release is organised as follows: HermiT.jar is a stand-alone version of HermiT that can be used from the command line or from within other Java programs. It contains all required libraries. org.semanticweb.HermiT.jar is a plugin for Protege version 4.1. It can be copied into the plugins folder of Protege. project/* is the Java Eclipse project for HermiT. It contains all sources (folders src, test, and getopt) and libraries (folder lib) incl. sources and can directly be imported into Eclipse.