Monrai Blog

News about Cypher, Semantic Web, Natural Language Processing, and Computational Linguistics

Thursday, August 10, 2006

OpenCyc 1.0

CycCorp has released OpenCyc 1.0. The Cyc system is a database of common sense assertions (e.g. rain is wet, grass is found outdoors). A couple of years back, I wrote a Cyc microtheory transcoder as a sort of toy application for Cypher. The system translated natural language descriptions, phrases and questions into microtheories in CycL and queries. But I couldn't get enough people interested to justify the work. Looks like I might be blowing the dust off that old code.

Here's more on the announcement from the OpenCyc website:

Release 1.0 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.


I'm trying to find a RDF view of the Cyc database that actually exposes the knowledge using RDF semantics, if anyone knows of one please let me know.

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