Jim, John and All  (01)
I found this presentation which compares several practical approaches using 
experimental data. It also provides a (predicted)time line for future progress.  (02)
 http://www.larkc.eu/wp-content/uploads/2008/04/larkc-kickoff-meeting-greaves.pdf  (03)
>
>To answer your question about when we can expect to merge independent
>knowledge bases, I suspect that the answer is never. When two banks
>merge, they never merge their databases. Either they keep both DBs
>operating independently, or they close the accounts from one DB and
>open new accounts in the other. But banks have been interoperating
>successfully since the Italian Renaissance by passing messages
>(either paper or electronic).
>
>People also interoperate by passing messages. Except for the
>rather rare Vulcan mind-melds, they never merge their knowledge
>bases. I doubt that computerized KBs will be merged any more
>easily than banks or people.
>
>Bottom line: Focus on message processing, not on merging KBs.
>
>John
>  (04) 
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