Probably irrelevant to the web at large, but it occurred to me that if you could describe the characteristic of agents in metadata, then other agents would be able to reason about them. I put together a rough RDF schema together for the purpose :
http://www.isacat.net/citnames/2001/04/rpp.htm (BrokenLink)
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DannyAyers
Dead reference, OrphanPage, can anyone make something of this?