At the time the Wikipedia 3.0: The End of Google? article was written, I didn’t think it necessary to supply external references, since it was just another idea of mine (came out of the blue on evening) and I had not expected the massive interest it would generate. Lately, however, I’ve been looking at what others have done and I came across this old but relevant paper from 2003, which should provide a more detailed technical context to developers as far as the use of rule-based inference engines and ontologies in the context of Semantic Web + AI (or Web 3.0.)
“A key requirement for the Semantic Web’s architecture overall is to be able to layer rules on top of ontologies–in particular to create and reason with rule-bases that mention vocabulary specified by ontology-based knowledge bases–and to do so in a semantically coherent and powerful manner.”
Evolving Trends 