Dear list, I intend to package two theorem provers, otter and spass, and a model builder, mace. Before I post the official ITP, I want to make sure the legal stuff. Otter and mace are distributed under a common license, which seems to be suitable for them to go into main. I attach this license below. Spass seems to be a little more difficult. (See license attached.) It restricts re-distribution to "non-commercial" and "non-safety-critical" purposes. This probably means that it has to go into non-free, right? What troubles me is the following paragraph: If you refer to the performance of SPASS in any result/experiment made public in any way, you must cite the version of SPASS. Moreover, any data needed to reproduce such a result/experiment must be publicly available. What implications does that have for Debian? Any comments are appreciated, Marco -- Marco Kuhlmann email@example.com
Otter and MACE Legal Information November 21, 2001. This information refers to the Otter and MACE automated deduction software, created at Argonne National Laboratory. Copyrights The University of Chicago has declined to assert its copyrights in this software. It may be used by the public without restriction and is available by download at www.mcs.anl.gov/AR/otter/. License This material resulted from work developed under a U.S. Government contract and is subject to the following license: the Government is granted for itself and the public a paid-up, nonexclusive, irrevocable worldwide license in this material to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly. Disclaimer NEITHER THE UNITED STATES GOVERNMENT NOR ANY AGENCY THEREOF, NOR ANY OF THEIR EMPLOYEES OR OFFICERS, MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LEGAL LIABILITY OR RESPONSIBILITY FOR THE ACCURACY, COMPLETENESS, OR USEFULNESS OF ANY INFORMATION, APPARATUS, PRODUCT, OR PROCESS DISCLOSED, OR REPRESENTS THAT ITS USE WOULD NOT INFRINGE PRIVATELY OWNED RIGHTS.
SPASS is an experimental implementation of a theorem prover for full first-order logic with equality. The tools dfg2otter.pl and dfg2tptp translate files in the SPASS DFG syntax in otter or tptp syntax, respectively. The scripts/binaries pcs and pgen can be employd for proof checking. We take no responsibility for any effect caused by this software. It is provided "AS IS" without express or implied warranty. In particular, it must be understood that this software is an experimental version, and is not suitable for use in any safety-critical application, and the authors deny a license for such use. You may use, copy, modify and distribute this software for any non-commercial and non-safety-critical purpose. Use of this software in a commercial product is not included under this license. You must maintain this copyright statement in all copies of this software that you modify or distribute. If you refer to the performance of SPASS in any result/experiment made public in any way, you must cite the version of SPASS. Moreover, any data needed to reproduce such a result/experiment must be publicly available. Although we tested SPASS and the tools and spent effort in making them reliable, it is not unlikely that they still contain bugs. Any comments or bug reports are highly appreciated. Please send comments and bug reports to firstname.lastname@example.org with subject COMMENT or BUG, respectively. Don't forget to provide all data necessary to reproduce the discovered problems or to understand your comments. This typically includes your platform, the SPASS (tool) version, input file or compiler settings if you started from sources. Consult the SPASS homepage http://spass.mpi-sb.mpg.de/ for recent developments and information. Have SPASS Christoph Weidenbach
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