i202 Fall 2010 School of Information, UC Berkeley

One interesting service that provides an ontology for common things is Freebase (which is now part of Google). You can look for a concept/person/place and Freebase will tell you different domains in which the concept is used. For example, if you look for Berkeley, you can refine your search for Berkeley (USA), Berkeley (UK), or Berkeley (University). You can go crazy and see that all the information that Freebase has about Berkeley is available as an RDF file.