OpenCyc License Information

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Cyc® Knowledge Base Copyright© 1995-2002 Cycorp, Inc., Austin, TX, USA.
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Cyc® Knowledge Server Copyright© 1995-2002 Cycorp, Inc., Austin, TX, USA.
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OpenCyc Knowledge Base Copyright© 2001-2002 Cycorp, Inc., Austin, TX, USA.
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OpenCyc Knowledge Server Copyright© 2001-2002 Cycorp, Inc., Austin, TX, USA.
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Other copyrights may be found in various files.

The OpenCyc Knowledge Base

The OpenCyc Knowledge Base consists of code, written in the declarative language CycL, that represents or supports the representation of facts and rules pertaining to consensus reality. OpenCyc is licensed using the GNU Lesser General Public License, whose text can also be found here. The OpenCyc CycL code base is the "library" referred to in the LGPL license. The terms of this license equally apply to renamings and other logically equivalent reformulations of the Knowledge Base (or portions thereof) in any natural or formal language.

The OpenCyc Java API and Other Non-CycL Open Source Code

Some other programs from those listed above are provided as open source. All of the programs of this type that currently ship with OpenCyc use the LGPL License, but it is possible that future released programs may use a different license. All license and copyright information for these programs are included in their distributions.

The OpenCyc Knowledge Server

The OpenCyc Knowledge Server consists of a binary derivative version of the Cyc® Inference Engine and Knowledge Base Index, a binary derivative version of the Cyc® Knowledge Base Browser, and (as of version 1.0) a suite of tools for rapidly extracting knowledge from a domain expert.

Cycorp is providing a free-of-charge license to the OpenCyc Knowledge Server that grants the Licensee the irrevocable right to download, to use, and to distribute the OpenCyc Knowledge Server in binary form for commercial or non-commercial use. By obtaining information, software, and/or documentation of the OpenCyc Knowledge Server in whole or in part (collectively, "Material"), you agree to be legally bound by the terms found here.


OpenCyc Knowledge Base License

GNU LESSER GENERAL PUBLIC LICENSE

Version 2.1, February 1999 Copyright (C) 1991, 1999 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copiesof this license document, but changing it is not allowed.[This is the first released version of the Lesser GPL. It also counts as the successor of the GNU Library Public License, version 2, hence the version number 2.1.]

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GNU LESSER GENERAL PUBLIC LICENSE

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END OF TERMS AND CONDITIONS


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