Formalized Common Knowledge
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Formalized Common Knowledge |
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OpenCyc for the Semantic WebNow it is even easier to use the rich and diverse collection of real-world concepts in OpenCyc to bring meaning to your semantic web applications! The full OpenCyc content is now available both as downloadable OWL ontologies as well as via semantic web endpoints (i.e., permanent URIs). These URIs return RDF representations of each Cyc concept as well as a human-readable version when accessed via a Web Browser. Searching for OpenCyc Content
Semantic Web EndpointsThe semantic web endpoints (i.e., URIs) for OpenCyc concepts are available in versions containing permanent concept identifiers as well as versions using language-specific labels. For example, the concept "Game" may be accessed via either:
Either of the above URIs will retrieve the definition of the given term as of the date in the URI. The current (i.e., most recent) version of the concept will always be available at an undated URI using the permanent identifier, e.g.: While the URIs using natural language labels may be more convenient for casual browsing, these labels are subject to change. Therefore, the URIs using the permanent identifiers are more reliable. Applications that require the most recent (i.e., automatically updated) content should use the undated URIs, as should other OWL ontologies linking to OpenCyc concepts. Web services that, among other things, support mapping between concepts and their expressions in natural language, are available at http://ws.opencyc.org. Speaking of which, here's Cyc expressing something in its best English. You can click on any of the concepts in this sentence to see the Semantic Web Endpoint for that concept. Downloadable OpenCyc OWL filesThe full OpenCyc content is available as OWL files on the OpenCyc Downloads page. Last updated: April 20th, 2009 |
