|  | Formalized Common Knowledge

Home Projects FAQ Documentation Releases Downloads Discussion News License |  | ## OpenCyc License Information ### Copyright Information Cyc® Knowledge Base Copyright© 1995-2002 Cycorp, Inc., Austin, TX, USA. All rights reserved. Cyc® Knowledge Server Copyright© 1995-2002 Cycorp, Inc., Austin, TX, USA. All rights reserved. OpenCyc Knowledge Base Copyright© 2001-2002 Cycorp, Inc., Austin, TX, USA. All rights reserved. OpenCyc Knowledge Server Copyright© 2001-2002 Cycorp, Inc., Austin, TX, USA. All rights reserved. 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 following terms.