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Re: Combined Inverse Functional Properties

From: <jos.deroo@agfa.com>
Date: Tue, 15 Feb 2005 18:39:28 +0100
To: henry.story@bblfish.net
Cc: danbri@w3.org, semantic-web@w3.org, semantic-web-request@w3.org
Message-ID: <OF4F633CF4.12DB99BD-ONC1256FA9.005FACE1-C1256FA9.0060FF28@agfa.com>

Hi, Henry

Using Turtle data

:a :r1 :b.
:a :r2 :c.
:a :r3 :d.
:a :r4 :e.
:a :r5 :f.
:g :r1 :b.
:g :r2 :c.
:g :r3 :d.
:g :r4 :e.
:g :r5 :f.
:p :cifp (:r1 :r2 :r3 :r4 :r5).


and N3 rules

{?C :cifp ?L.
 (?X ?Y) :cifpForAllOf ?L}
 =>
{?X owl:sameAs ?Y}.

{}
 =>
{(?X ?Y) :cifpForAllOf rdf:nil}.

{?L rdf:first ?A.
 ?X ?A ?O.
 ?Y ?A ?O.
 ?L rdf:rest ?B.
 (?X ?Y) :cifpForAllOf ?B}
 =>
{(?X ?Y) :cifpForAllOf ?L}.


asking N3QL query

[] q:select {?X owl:sameAs ?Y}; q:where {?X owl:sameAs ?Y}.


gave same results

:a owl:sameAs :a. 
:a owl:sameAs :g. 
:g owl:sameAs :a. 
:g owl:sameAs :g. 


Couldn't test it with Cwm, but is what was answer of Euler :)


-- 
Jos De Roo, AGFA http://www.agfa.com/w3c/jdroo/




Henry Story <henry.story@bblfish.net>
15/02/2005 15:51

 
        To:     Jos De_Roo/AMDUS/MOR/Agfa-NV/BE/BAYER@AGFA
        cc:     semantic-web@w3.org, danbri@w3.org, semantic-web-request@w3.org
        Subject:        Re: Combined Inverse Functional Properties


Thanks. That's perfect. That has helped me both learn N3 and is a nice 
solution.
All we need is to generalize this to CIFPs of any size and we have a 
really useful concept, ready to go up on the wiki :-)

Henry Story

On 15 Feb 2005, at 14:35, jos.deroo@agfa.com wrote:
> Hi, Dan
>
> I did just a 5 min test with Cwm and Euler :)
>
> given data
>
> :a :r1 :b.
> :a :r2 :c.
> :g :r1 :b.
> :g :r2 :c.
> :p :cifp (:r1 :r2).
>
>
> and some rules capturing only cases for 1, 2 and 3 cifp properties
>
> {?C :cifp ?L.
>  ?L rdf:first ?P;
>     rdf:rest rdf:nil.
>  ?A ?P ?X.
>  ?B ?P ?X}
>  =>
> {?A owl:sameAs ?B}.
>
> {?C :cifp ?L.
>  ?L rdf:first ?P;
>     rdf:rest ?M.
>  ?M rdf:first ?Q;
>     rdf:rest rdf:nil.
>  ?A ?P ?X;
>     ?Q ?Y.
>  ?B ?P ?X;
>     ?Q ?Y}
>  =>
> {?A owl:sameAs ?B}.
>
> {?C :cifp ?L.
>  ?L rdf:first ?P;
>     rdf:rest ?M.
>  ?M rdf:first ?Q;
>     rdf:rest ?N.
>  ?N rdf:first ?R;
>     rdf:rest rdf:nil.
>  ?A ?P ?X;
>     ?Q ?Y;
>     ?R ?Z.
>  ?B ?P ?X;
>     ?Q ?Y;
>     ?R ?Z}
>  =>
> {?A owl:sameAs ?B}.
>
>
> the N3QL query
>
> [] q:select {?X owl:sameAs ?Y}; q:where {?X owl:sameAs ?Y}.
>
> gave us
>
> :a owl:sameAs :a.
> :a owl:sameAs :g.
> :g owl:sameAs :a.
> :g owl:sameAs :g.
>
Received on Tuesday, 15 February 2005 17:40:17 GMT

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