Seems to me like Google is exploring several roads at the same time - for example, both microformat tagging as well as the heavier lifting that various types of semantic analysis can provide. Microformats are limited by the adoption rate of the marketplace, so Google can't depend on just that if they're going to do the best job.
Msg#: 4116105 posted 5:05 am on Apr 20, 2010 (gmt 0)
Thanks for your thoughts tedster.
I guess was being a bit glib - I don't expect actual RDF for categories but more like: "OK so they say they are sellers of widgets let's see - do they have: a business address a company number employees by name high level pages on widgets detailed pages on widgets etc"
I fascinated by what "relevance" means in the face of a perfectly disambiguated search query.