On 1/21/13 12:04 AM, John F Sowa wrote:
> Kingsley and Len,
>
> I want to emphasize that theoretical issues and practical issues are
> *both* important. The best combination is to have developers who
> understand both theory and practice.
>
> KI
>> I only disagree with John when he pitches Google, Facebook etc..
>> as examples of companies that have disregarded the essence of the
>> Semantic Web vision etc.. Likewise, when he pits SQL against SPARQL :-)
> Two points:
>
> 1. I consider Tim B-L as somebody who has a good background in both
> theory and practice. I have more sympathy with his vision than
> I have with some of the academics who lack his experience. (01)
Yes, I agree. (02)
>
> 2. Re SPARQL and SQL: I prefer logic-based notations like Datalog
> to either one of them, as notations. But I just want to emphasize
> that you can use many different notations (SPARQL, SQL, Datalog,
> controlled NLs, conceptual graphs, etc., etc.) with many different
> methods for storing the data. (03)
Yes, of course. (04)
>
> LY
>> I disagree with characterization of *semantics* of SQL as purely
>> theoretical issue with no significant practical implications...
> As I said, theory and practice are both important. In any case,
> there are many, many different combinations of notations, logical
> expressiveness, and storage methods that have different kinds of
> tradeoffs for different kinds of applications.
>
> The worst policy is to make decisions based on one-line slogans
> about complicated issues such as decidability, expressive power,
> notations, storage methods, CWA, OWA, etc. (05)
Amen! (06)
>
> John
>
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> (07)
-- (08)
Regards, (09)
Kingsley Idehen
Founder & CEO
OpenLink Software
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