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OpenCyc just got better --- much better!


OpenCyc 1.0.2 is available for download now

or try it out here.

Logon as CycAdministrator. Feel free to make assertions.
Program is restarted each night.

Or you can just browse the content of the OpenCyc knowledge base
using the Cyc Foundation Browser.

OpenCyc

OpenCyc is the open source version of the Cyc technology, the world's largest and most complete general knowledge base and commonsense reasoning engine. OpenCyc can be used as the basis of a wide variety of intelligent applications such as:

  • rapid development of an ontology in a vertical area
  • email prioritizing, routing, summarization, and annotating
  • expert systems
  • games

to name just a few.

Release 1.0.2 of OpenCyc includes:

  • The entire Cyc ontology containing hundreds of thousands of terms, along with millions of assertions relating the terms to each other, forming an upper ontology whose domain is all of human consensus reality.
  • English strings corresponding to all concept terms, to assist with search and display.
  • A compiled version of the Cyc Inference Engine and the Cyc Knowledge Base Browser.
  • Documentation and self-paced learning materials to help users achieve a basic- to intermediate-level understanding of the issues of knowledge representation and application development using Cyc.
  • A specification of CycL, the language in which Cyc (and hence OpenCyc) is written.
  • A specification of the Cyc API for application development.
  • NEW! Links between Cyc concepts and WordNet synsets.

Cyc Training available

January 17, 2008 -- Cycorp will be offering a three-day, hands-on Cyc introductory course in Austin, TX on May 5-7, 2008 and a two-day class cover advanced Cyc topics on May 8-9, 2008. Click here for additional information or contact us at cyc101 @ cyc.com for information about customized semantic knowledge management or ontology development training.

Announcing: The Cyc Foundation

Austin, TX. April 14, 2006 -- A new independent non-profit organization was announced Thursday night at the monthly meeting of Cyclify-Austin, the Cyc User's group. The Cyc Foundation is now forming to manage the OpenCyc ontology and to grow the ontology and knowledge base exponentially with the help of volunteers from all walks of life.

Foundation president, John De Oliveira, compared the Foundation's "Cyclify" effort to the Wikipedia project. He said, "The Wikimedia Foundation asks us to 'Imagine a world in which every single person is given free access to the sum of all human knowledge.' In the Cyclify project, led by The Cyc Foundation, we ask you to imagine a world in which every single person is given free access to programs that reason with the sum of all human knowledge."

Those interested in participating in the Cyclify Project or assisting the Cyc Foundation in any way should send email to johndcyc@gmail.com.

How to Join
To subscribe to any of our mailing lists, click here.

OpenCyc is being considered as a standard by the IEEE. You can learn about participating in the Standard Upper Ontology working group by visiting http://suo.ieee.org/. Anyone can become a voting member by visiting here.

OpenCyc development is being hosted at:

SourceForge.net Logo

     
click for enlarged image
The OpenCyc KB Browser

Announcements
2008/01/17 - The Spring 2008 session of Cyc Training will be held during the week of May 5th, 2008 in Austin, Texas.

2007/03/10 - A new, simplified browser is available from The Cyc Foundation to let you explore the contents the OpenCyc ontology.

2006/04/03 - Cyclify Austin meets on the second Thursday of each month in Austin, TX. All members of the OpenCyc community are welcome. For details, please send an email to opencyc@cyc.com.

2004/06/04 - The OWL scaffolding version of OpenCyc v0.7.8b can be found here (>700MB). This file contains #$isa, #$genls and #$comment assertions for over 60,000 Cyc constants. Caution: This file takes approximately 9 hours to load into Protege.

2004/03/26 - The OWL version of OpenCyc v0.6.0b can be found here.

2001/06/07 - The CycML schema document can be found here.

             

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