Contextual Data Storage & Retrieval
Actually, "contextual" indexing and retrieval has been part of the algo at the "theme-based" engines (Google, Alltheweb and Lycos) for a couple years now at least. Some of the components are Latent Symantic Indexing and Term Vectoring. If you've got the patience and time, Study those subjects. My Clients and I have been prospering from knowledge of how this works for almost two years now. And I agree that this area is the most interesting and where many of the coolest innovations of search marketing are and will be appearing.
Optimized regards,
Robert
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