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Re: taxonomy for use case requirements

From: Eric Prud'hommeaux <eric@w3.org>
Date: Thu, 8 Apr 2004 11:08:15 -0400
To: Jos De_Roo <jos.deroo@agfa.com>
Cc: public-rdf-dawg@w3.org
Message-ID: <20040408150815.GD20623@w3.org>

five-line reply in line below:

On Thu, Apr 08, 2004 at 04:37:06PM +0200, Jos De_Roo wrote:
> Eric wrote:
> > During the last telecon, I suggested that we use terms from RDF Query
> > and Rules Framework [1] to describe the requirements for each use
> > case. The requirements could be layed out similarly to the language
> > characteristics in the RDF Query Survey [2].
> >
> > I don't expect the framework to be complete, but I do expected that it
> > will serve as a good starting point. We can argue about terms like
> > disjunction in the abstract, or we can have them layed out in a
> > document describing and constrasting them. Hopefully this can save us
> > a little bit of tedium.
> 
> Concerning "disjunction" I tried a similar test case
> 
> given
> :Xavier :worksAt :night.
> :Xavier :worksIn :systemMaintenance.
> 
> and asking
> {_:Y :worksIn :processControl} :or
> {_:Y :worksIn :systemMaintenance; :worksAt :night}.
> 
> we got a direct answer
> {:Xavier :worksIn :processControl} :or
> {:Xavier :worksIn :systemMaintenance. :Xavier :worksAt :night}. 
> 
> and we just assume implications such as
> ?P => {?P :or ?Q}.
> ?Q => {?P :or ?Q}.
> (but had to fix some "variable" issues
> in the euler running code...)
> 
> Of course, posing 2 questions and merging
> their answer graphs should also work.

some trade-off though:

(A || B) && (C || D || E) && (F || G)
requires 2*3*2=12 queries. (ACF, ACG, ADF, ADG, AEF, AEG, B..)

!(A || B)
can't be expressed (ask for !A and have the local agent remove B).

> > [1] http://www.w3.org/2001/11/13-RDF-Query-Rules/terms
> > [2] http://www.w3.org/2001/11/13-RDF-Query-Rules/#summary
> 
> very interesting
> 
> > -- 
> > -eric
> >
> > office: +81.466.49.1170 W3C, Keio Research Institute at SFC,
> >                         Shonan Fujisawa Campus, Keio University,
> >                         5322 Endo, Fujisawa, Kanagawa 252-8520
> >                         JAPAN
> >         +1.617.258.5741 NE43-344, MIT, Cambridge, MA 02144 USA
> > cell:   +1.857.222.5741 (does not work in Asia)
> >
> > (eric@w3.org)
> > Feel free to forward this message to any list for any purpose other than
> > email address distribution.
> 
> -- 
> Jos De Roo, AGFA http://www.agfa.com/w3c/jdroo/

-- 
-eric

office: +81.466.49.1170 W3C, Keio Research Institute at SFC,
                        Shonan Fujisawa Campus, Keio University,
                        5322 Endo, Fujisawa, Kanagawa 252-8520
                        JAPAN
        +1.617.258.5741 NE43-344, MIT, Cambridge, MA 02144 USA
cell:   +1.857.222.5741 (does not work in Asia)

(eric@w3.org)
Feel free to forward this message to any list for any purpose other than
email address distribution.
Received on Thursday, 8 April 2004 11:08:15 GMT

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