On Wed, May 22, 2013 12:44, Kingsley Idehen wrote:
> On 5/22/13 11:00 AM, doug foxvog wrote:
>> ...
>> RDF does have awkward ways of
>> representing such relations, but a syntax that is not limited to
>> triples would be (imho) far better to use, especially when "targeting
>> less technical audiences."
>
> Yes-ish, but I don't know of any non technical audience profiles that
> would be confused by structured data being expressed (presented) and
> encoded using patterns that resemble basic sentence structure. (01)
"Basic sentence structure" involves lists. In English one has direct and
indirect objects. One can say, "one from three is two". These are
basic sentence structures that are not natively expressed as triples
and can not be simply expressed as triples. (02)
> RDBMS
> vendors successfully built an industry around a misaligned view of data
> via the two-dimensional table and literal identifiers. If that could be
> done, I do believe one could also build an industry around a more
> accurate conceptual view of data using an entity relationship model
> based on subject->predicate->object relations expression syntax that can
> be encoded using a variety of notations. (03)
Allowing objects instead of literals certainly eases things. But restricting
the 2D table to having only two columns (with one holding the row
identifier) greatly complicates them. (04)
> In my experience, RDF is all about enhancing the existing entity
> relationship model [1] by adding the following to the mix: (05)
> 1. explicit (rather than implicit) machine- and human-comprehensible
> entity relationship semantics; (06)
but restricting them to binary relations. I note that Chen's dissertation
[1]
defines relations as n-ary:
"A relationship set, Ri, is a mathematical relation among n entities
each taken from an entity set:
{[e1, e2, . . . , en] | e1 E E1, e2 E E2, . . . , en E En},
and each tuple of entities, [el, e2, , . . , en], is a relationship." (07)
The n-ary entity relationship semantics of RDF is not easily human
comprehensible. (08)
> 2. use of IRIs as the mechanism for denoting subject, predicate, and
> objects of relations. (09)
> The perceived awkwardness of the above shouldn't be a definitive
> detraction per se. :-) (010)
As long as one only models binary relations, the awkwardness is
avoided. But even a claw hammer is not the best tool for each
job. (011)
-- doug foxvog (012)
> Links:
>
> [1] http://bit.ly/YTdz3N -- Peter Chen's 1976 dissertation about the
> unified view of data using the entity relationship model .
>
> Kingsley
>>
>> -- doug foxvog
>>
>>> Kingsley
>>>> Regards
>>>>
>>>> Matthew West
>>>> Information Junction
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>>>>> --
>>>>>
>>>>> Regards,
>>>>>
>>>>> Kingsley Idehen
>>>>> Founder & CEO
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>>> Regards,
>>>
>>> Kingsley Idehen
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>
> --
>
> Regards,
>
> Kingsley Idehen
> Founder & CEO
> OpenLink Software
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