>Len Yabloko wrote:
>>> John F. Sowa wrote:
>>>> Paola, Kingsley, and Cecil,
>>>> What we do at VivoMind is to represent everything in conceptual
>>>> graphs and to index the graphs by a Cognitive Signature (TM) as
>>>> they arrive. When new graphs arrive, we compute their Cognitive
>>>> Signatures, check whether we ever saw anything similar, and
>>>> retrieve the previous cases.
>>> Cool, he kind of thing you can also do over a cluster of servers, even
>>> if you provide SPARQL or SQL as entry points to the engine.
>> Obviously, since as John pointed out all different data representations are
>essentially logical equivalent. I think this a case of confusing logic with
>semantics. The question should be: are all these so called "conceptual views"
>represent the same concepts.
>>> This is a very important point, as this is ultimately how the strange
>>> DBMS void between RDBMS (schema first; column or row stores) and Graph
>>> Model DBs (e.g. RDF Stores) will be bridged.
>> The void can only be bridged with reach semantics providing intended
>interpretation and composition for conceptual structures. RDF does not provide
>these (IHMO). Looking at the pretty pictures in your link I don't see how all
>different databases at the bottom end-up exposing conceptual view at the top.
>Links (assuming I hadn't posted these earlier re. the generation of a
>concrete conceptual data access layer that starts with a logical
>(note: some of the live demo links are broken, but will be fixed soon)
Thank you for the links. I have seen various versions of these before. None of
them answers my simple question: how do we know that "conceptual views"
consistently represent the same concepts. This problem is a direct consequence
of the OWA. All your presentations pretend that the problem does not exists.
Take a look at this link that explains the problem and possible solutions:
>Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen
>President & CEO
>OpenLink Software Web: http://www.openlinksw.com
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