Editing Cyc (section)

==Releases==

===OpenCyc===
The first version of OpenCyc was released in spring 2002 and contained only 6,000 concepts and 60,000 facts. The knowledge base was released under the [[Apache License]]. Cycorp stated its intention to release OpenCyc under parallel, unrestricted licences to meet the needs of its users. The [[CycL]] and SubL interpreter (the program that allows users to browse and edit the database as well as to draw inferences) was released free of charge, but only as a binary, without [[source code]]. It was made available for [[Linux]] and [[Microsoft Windows]]. The open source Texai<ref>{{cite web |title=The open source Texai project |url=http://www.texai.org |archive-url=https://web.archive.org/web/20090216201139/http://texai.org/blog |archive-date=2009-02-16}}</ref> project released the [[Resource Description Framework|RDF]]-compatible content extracted from OpenCyc.<ref>{{cite web| url = http://sourceforge.net/project/showfiles.php?group_id=176781| title = Texai SourceForge project files}}</ref> The user interface was in Java 6.

Cycorp was a participant of a [[working group]] for the Semantic Web, [[Standard Upper Ontology]] Working Group, which was active from 2001 to 2003.<ref>{{Cite web |date=2013-01-15 |title=Standard Upper Ontology Working Group (SUO WG) - Home Page |url=http://suo.ieee.org/ |access-date=2024-12-16 |archive-url=https://web.archive.org/web/20130115180720/http://suo.ieee.org/ |archive-date=15 January 2013 }}</ref>

A [[Semantic Web]] version of OpenCyc was available starting in 2008, but ending sometime after 2016.<ref>{{Cite web |title=OpenCyc for the Semantic Web |url=http://sw.opencyc.org/ |archive-url=https://web.archive.org/web/20080821052740/http://sw.opencyc.org/ |archive-date=21 August 2008 |access-date=2024-12-16}}</ref>

OpenCyc 4.0 was released in June 2012.<ref>{{Cite web |date=2012-06-23 |title=OpenCyc.org |url=http://opencyc.org/ |access-date=2024-12-16 |archive-url=https://web.archive.org/web/20120623165538/http://opencyc.org/ |archive-date=23 June 2012 }}</ref> OpenCyc 4.0 contained 239,000 concepts and 2,093,000 facts; however, these are mainly [[Taxonomy|taxonomic]] assertions.

4.0 was the last released version, and around March 2017, OpenCyc was shutdown for the purported reason that "because such “fragmenting” led to divergence, and led to confusion amongst its users and the technical community generally thought that OpenCyc fragment ''was'' Cyc.".<ref>{{Cite web |title=OpenCyc |url=http://opencyc.org/ |archive-url=https://web.archive.org/web/20170422212642/http://opencyc.org/ |archive-date=22 April 2017 |access-date=2024-12-16}}</ref>

===ResearchCyc===
In July 2006, Cycorp released the [[executable]] of ResearchCyc 1.0, a version of Cyc aimed at the research community, at no charge. (ResearchCyc was in beta stage of development during all of 2004; a beta version was released in February 2005.) In addition to the taxonomic information, ResearchCyc includes more semantic knowledge; it also includes a large lexicon, [[English language|English]] parsing and generation tools, and [[Java (programming language)|Java]]-based interfaces for knowledge editing and querying. It contains a system for [[ontology-based data integration]].