Topic map conversion of OpenCyc

OpenCyc is a large general knowledge base and commonsense reasoning engine. OpenCyc is open source and limited version of the Cyc. Topic map conversion of the OpenCyc is based on RDF conversion of the OpenCyc provided by Stephen L. Reed for his Texai project. Topic map conversion was created with Wandora's RDF import feature following light manual processing.

Download

There are two versions of the OpenCyc topic map available:

• OpenCyc Wandora project file (14.6MB) is targeted for Wandora users. Wandora requires at least 1.4G of memory to open the OpenCyc project file successfully.
• OpenCyc XTM dump (zipped 14.8MB, uncompressed 250 MB) is targeted for all topic map applications capable to import XTM format.

History

• 2008-07-15. First version published.

Metrics

Metrics have been measured on OpenCYC layer of the Wandora project file. The XTM dump metrics may differ a bit.

• Number of topics: 120410
• Number of associations: 424064
• Number of topic base names: 120409
• Number of subject identifiers: 120415
• Number of subject locators: 0
• Number of occurrences: 244173
• Number of distinct topic classes: 1
• Number of distinct types of associations: 73
• Number of distinct roles in associations: 4
• Number of distinct players in associations: 116212
• Average clustering coefficient: 0.16878

Conversion details

Will be written shortly.

Limitations

• The topic map conversion contains only OpenCyc's binary relations.
• Non-atomic terms are not included.
• Topic Maps do not support semantics of many OpenCyc relations.

License

GNU General Public License (GPL)