Hello Michael, (01)
I am indeed convinced that free n-tuples are a pain, because everybody is
free to create his own n-tuples and there is no common convention to
interpret them. The relations between the elements in the tuples are not
explicit, neither are the roles that those elements play in those relations.
My research is oriented towards a common formal language and a universal
data structure.
I think that triples play an important role in that, but an implementation
in triples make it very verbose and difficult to read. I converged towards a
standard n-tuple (not necessarily ordered) that can be represented in a
standard table in which many elements are optional or can have a default
value. (02)
That standard n-tuple forms the Gellish Data Table that is the universal
data structure that I mentioned in my previous mail as being described in
the document "Definition of Universal Semantic Databases and Data Exchange
Messages" on http://www.gellish.net/downloads/category/2-english.html . (03)
With kind regards,
Andries (04)
-----Oorspronkelijk bericht-----
Van: ontolog-forum-bounces@xxxxxxxxxxxxxxxx
[mailto:ontolog-forum-bounces@xxxxxxxxxxxxxxxx] Namens Michael Brunnbauer
Verzonden: woensdag 5 september 2012 14:06
Aan: [ontolog-forum]
Onderwerp: Re: [ontolog-forum] Accommodating legacy software (05)
Hello Kingsley, (06)
I think doug really has a point here. Imagine how simple the conversion of a
RDB to RDF would be if we had n-ary relations. Of course the usefulness
of such an 1:1 conversion is doubtful but the entry threshold would be
lower. (07)
Am I right that you are OK with quick and simple conversions to RDF where
the
real value is added via mappings later ? Some of your data integration tools
probably work this way. (08)
I have wondered about the restriction to triples publicly several times and
never got an answer about the reasons for it. Was it for simplicity of
implementation ? Do we really know that n-tuples would be a pain ? (09)
Regards, (010)
Michael Brunnbauer (011)
On Wed, Sep 05, 2012 at 07:22:56AM -0400, Kingsley Idehen wrote:
> On 9/5/12 12:02 AM, doug foxvog wrote:
> >On Tue, September 4, 2012 17:02, Kingsley Idehen wrote:
> >>On 9/4/12 3:41 PM, doug foxvog wrote:
> >>>On Tue, September 4, 2012 12:34, Kingsley Idehen wrote:
> >...
> >
> >>>>I believe Data denotes Subject Observation.
> >>>>I believe all observations are comprised of:
> >>>>1. a subject
> >>>>2. subject attributes
> >>>>3. subject attribute values.
> >...
> >>>One common type of observation is that A is between B and C.
> >>>How would you express this with a single triple? 8)#
> >>I would state that A is between B. A is Between C. Then I would define
> >>the semantics of the 'Between' predicate .
> >!??
> >Let's explore this:
> > (and
> > (between 10 5 11)
> > (between 10 4 11)
> > (between 10 6 11)
> > (between 10 7 11))
> >Using the KI translator this becomes:
> > AND
> > 10 is between 5
> > 10 is between 11
> > 10 is between 4
> > 10 is between 11
> > 10 is between 6
> > 10 is between 11
> > 10 is between 7
> > 10 is between 11.
> >
> >What semantics does the between predicate have?
>
> And that isn't what I was conveying to you. Basically, at what point did
> you indicate we where dealing with typed literals? You said A between B
> and B between C. Why on earth should I assume A, B, and C are typed
> literals? Just because you used the literal 'Between' in some kind of
> fuzzy context?
>
> RDF is pretty clear about the semantics for typed literals.
> >
> >How about the quaternary predicate, isBetweenOnPath?
> >Can you express the following with triples:
> >
> >(and
> > (isBetweenOnPath WashingtonDC Maryland Virginia I95)
> > (not (isBetweenOnPath WashingtonDC Maryland Virginia I495)))
>
> I think we are now talking past ourselves.
>
> If you have some alternative to RDF that works, just point me to it. I
> think that's the best use of our respective time at this juncture.
>
> Kingsley
> >
> >
> >-- doug foxvog
> >...
> >>Kingsley
> >>>-- doug foxvog
> >
> >
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> >
>
>
> --
>
> Regards,
>
> Kingsley Idehen
> Founder & CEO
> OpenLink Software
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>
>
>
> (012)
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