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Re: Another approach to Nary relations

From: Natasha Noy <noy@SMI.Stanford.EDU>
Date: Mon, 16 Aug 2004 11:40:47 -0700
Message-Id: <C9DCA17C-EFB3-11D8-929A-000A958B5C28@smi.stanford.edu>
Cc: <public-swbp-wg@w3.org>
To: "Yoshio FUKUSHIGE" <fuku@w3.org>

Dear Yoshio,

I looked at your document, and despite the fact that there are indeed 
not that many words, it's actually a very clear one :)

Up until the reification and probability, it seems you are basically 
using pattern 2 from the WD "as is", aren't you? Except that you also 
allow for there being only one or two components in the relation. 
Pattern 2, however, while presented as to solve a problem for relations 
with arity > , can indeed be applied to relations with fewer arguments. 
Perhaps, it's a point worth making under "Considerations".

Reification and probability, however, adds an extra level there that is 
probably more appropriate if indeed you want to treat uncertainty 
property, but is not really a subject of a note on n-ary relations. It 
seems, however, that it may be a good idea to write a separate note 
describing design patterns for representing uncertainty. What do others 
think? I believe, adding this note to the set of OEP documents would be 
a very good idea, and Yoshio has essentially already started on that.

I am also beginning to think that maybe we should remove probability 
from this note on n-ary relations altogether -- it seems to be one of 
those issues that raises more confusion than it solves, and the purpose 
of the note is not  really to talk about representation of probability 

On Aug 11, 2004, at 11:21 AM, Yoshio FUKUSHIGE wrote:

> Hello Natasha and people in public-swbp-wg,
> My name is Yoshio Fukushige, a w3c fellow from Matsushita Electric
> Industrial (Panasonic),
> and this is, I think, my third post to this mailing list.
> I offer congratulations to the SWBPDWG on its publication of
> "Defining N-ary Relations on the Semantic Web: Use With Individuals" 
> as a
> working draft.
> Though I'm not a member of the WG, I've been interested in the
> representation of the Nary relations
> and would like to present another approach to it.
> My approach is, in short, to generalize the "pattern 2" approach in 
> the WD
> to all Nary relations,
> which I'd like to call the Predicate-Center approach.
> While being almost a graffiti, my basic idea can be found in
> http://www.w3.org/2004/08/12-Yoshio/onNaryRelations.html,
> with corresponding structures for the examplaes in the WD
> and some discussion on representing causal constructions, reification 
> and
> uncertainty.
> While sufficient verbal explanation is not supplied there(to my 
> regrets),
> you can see the outline from examples in N3 and graphs.
> I would be very happy if anyone here takes a look at it and give me
> comments,
> and I hope this can inspire a discussion and finaly contribute a 
> single bit
> to the next version of the WD.
> **Note this is a personal proposal from Yoshio Fukushige and NOT 
> by any fraction of the W3C.**
> Best regards,
> Yoshio Fukushige
> fuku@w3.org
Received on Monday, 16 August 2004 18:40:47 UTC

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