Len Yabloko wrote:
>> Len Yabloko wrote:
>>
>>> Kingsley,
>>>
>>>
>>>> John F. Sowa wrote:
>>>>
>>>>
>>>>> Paola, Kingsley, and Cecil,
>>>>> [SNIP]
>>>>>
>>>>> 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.
>>>
>>>
>>>
>> Len,
>>
>> Links (assuming I hadn't posted these earlier re. the generation of a
>> concrete conceptual data access layer that starts with a logical
>> Relational Schema):
>>
>> 1.
>>
>http://virtuoso.openlinksw.com/Whitepapers/html/VirtOpenConceptualDataModelsPaper.html
>> 2. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VOSSQL2RDF
>> (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:
> http://owl.cs.manchester.ac.uk/2008/iswc-tones/slides/TonesTutorial08-4.pdf
>
Len, (01)
We don't pretend about anything. (02)
Can you simply layout a scenario e.g., Relational Data (e.g. HR
system), Customer Services Data (CRM), Finance and General Mgmt. (ERP).
Then outline your notion of Entities and associated conceptual views
that would exist across these domains. (03)
If the above isn't what your talking about, then layout a real world
example. (04)
I don't have any time for PDFs. I like to deal with real problems and
show real solutions etc.. (05)
Kingsley
>
>
>> --
>>
>>
>> Regards,
>>
>> Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen
>> President & CEO
>> OpenLink Software Web: http://www.openlinksw.com
>>
>>
>>
>>
>>
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> (06)
-- (07)
Regards, (08)
Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen
President & CEO
OpenLink Software Web: http://www.openlinksw.com (09)
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