RE: OWL Full reasoning

Hi, Hans

There is an excellent "Semantic Web Tutorial Using N3"
at http://www.w3.org/2000/10/swap/doc/ and in particular
for the N3 rules http://www.w3.org/2000/10/swap/doc/Rules
There is also http://www.w3.org/DesignIssues/Notation3.html
and http://www.w3.org/2000/10/swap/grammar/n3rules-report.html

Best regards,
Jos

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




"Hans Teijgeler" <hans.teijgeler@quicknet.nl>
20/08/2005 09:04

 
        To:     Jos De_Roo/AMDUS/MOR/Agfa-NV/BE/BAYER@AGFA
        cc:     <semantic-web@w3.org>
        Subject:        RE: OWL Full reasoning


Hi Jos,

Where can I learn the meaning of the symbology you use in:

### inference rules for Web Ontology Language OWL

{?P @has owl:inverseOf ?Q. ?S ?P ?O} => {?O ?Q ?S}.
{?P @has rdf:type owl:SymmetricProperty. ?S ?P ?O} => {?O ?P ?S}.

{?P @has rdf:type owl:TransitiveProperty. ?X ?P ?O. ?S ?P ?X} => {?S ?P 
?O}.

{?R @has owl:onProperty ?P; owl:hasValue ?Y. ?X a ?R} => {?X ?P ?Y}.

{?P @has rdf:type owl:InverseFunctionalProperty. ?X ?P ?O. ?Y ?P ?O} => 
{?X
owl:sameAs ?Y}.

etc

Regards,
Hans

-----Original Message-----
From: jos.deroo@agfa.com [mailto:jos.deroo@agfa.com] 
Sent: Friday, August 19, 2005 10:44 PM
To: hans.teijgeler@quicknet.nl
Cc: semantic-web@w3.org
Subject: RE: OWL Full reasoning

Hi, Hans

The OWL Full reasoning that engines like cwm and euler are
doing is via an explicit set of rules that you give them.
In the past years I did some such rules at
http://eulersharp.sourceforge.net/2003/03swap/rdfs-rules.n3
http://eulersharp.sourceforge.net/2003/03swap/owl-rules.n3
but I wouldn't really recommend those as it was mainly done
to check the RDF and OWL test cases.

Our practical experience (in healthcare domain) is that a few
rules are fine for many cases and one such set is at
http://eulersharp.sourceforge.net/2003/03swap/rpo-rules.n3
(but you will need more rules :))


I prefer to have public communcation where possible..
(and am still in vacation till end of next week :))
In order to see what we talk about I've copied the N3 file to
http://eulersharp.sourceforge.net/2004/04test/ontology-for-data-model.n3
(obtained via java -Xmx1200m jena.rdfcopy %1 RDF/XML N3)
and it are those ""^^xsd:nonNegativeInteger that are not fine
i.e. you should have something like "2"^^xsd:nonNegativeInteger

Have a very nice weekend :)
(een prettig weekend :))

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




"Hans Teijgeler" <hans.teijgeler@quicknet.nl>
19/08/2005 21:59

 
        To:     Jos De_Roo/AMDUS/MOR/Agfa-NV/BE/BAYER@AGFA
        cc:     <semantic-web@w3.org>
        Subject:        RE: OWL Full reasoning


Hi Jos,
 
Thanks for the effort! It is VERY important to us, because it gives us 
hope that we indeed can perform reasoning to information that is modelled 
in our style. The alternative might have been to denormalize our data 
model (or better said: cripple it) in order to make it suitable for DL.
 
I have two questions: 
1.       The W3C site qualifies cwm as: -- useful but incomplete OWL Full 
It looks like it is pretty capable. How "incomplete OWL Full" is it 
really, and is work underway to make it less incomplete?
2.       Can we work, off-line or on-line (your choice), on what you
mentioned in 
the very last paragraph below?
 
Kind regards,
Hans
 
-----Original Message-----
From: semantic-web-request@w3.org [mailto:semantic-web-request@w3.org] On 
Behalf Of jos.deroo@agfa.com
Sent: Friday, August 19, 2005 1:59 PM
To: hans.teijgeler@quicknet.nl
Cc: semantic-web@w3.org
Subject: Re: OWL Full reasoning
 
 
Hi, Hans
 
I looked a bit to your interesting case and did a simple test
The N3 [1] that follows can be automatically converted to RDF/XML using 
cwm [2]
and cwm is also used as reasoner as well as euler [3] (as Danny mentioned 
:))
 
The input of the test is the following
 
##########################################################
@prefix log: <http://www.w3.org/2000/10/swap/log#>.
@prefix owl: <http://www.w3.org/2002/07/owl#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix iso: <http://www.tc184-sc4.org/iso15926/part2/2003-12#> .
@prefix : <hans#>.
 
 
### input
 
:flange_on_pump_P-101 a iso:PhysicalObject.
:flange_on_pipe_A-265-h a iso:PhysicalObject.
 
:direct_connection a iso:DirectConnection, :R1, :R2;
    :side1 :flange_on_pump_P-101;
    :side2 :flange_on_pipe_A-265-h.
 
:R1 a owl:Restriction;
    owl:onProperty :side1;
    owl:allValuesFrom iso:PossibleIndividual.
 
:R2 a owl:Restriction;
    owl:onProperty :side2;
    owl:allValuesFrom iso:PossibleIndividual.
 
 
### RDF plus OWL rules
# extending http://eulersharp.sourceforge.net/2003/03swap/rpo-rules.n3
 
rdfs:subClassOf rdfs:domain rdfs:Class; rdfs:range rdfs:Class; a 
owl:TransitiveProperty.
rdfs:subPropertyOf rdfs:domain rdf:Property; rdfs:range rdf:Property; a 
owl:TransitiveProperty.
owl:inverseOf rdfs:domain owl:ObjectProperty; rdfs:range 
owl:ObjectProperty; a owl:SymmetricProperty.
owl:differentFrom rdfs:domain owl:Thing; rdfs:range owl:Thing; a 
owl:SymmetricProperty.
owl:distinctMembers rdfs:domain owl:AllDifferent; rdfs:range rdf:List.
rdf:first rdfs:domain rdf:List; rdfs:range rdfs:Resource; a 
owl:FunctionalProperty.
rdf:rest rdfs:domain rdf:List; rdfs:range rdf:List; a 
owl:FunctionalProperty.
 
{?P rdfs:domain ?C. ?S ?P ?O} => {?S a ?C}.
{?P rdfs:range ?C. ?S ?P ?O} => {?O a ?C}.
{?A rdfs:subClassOf ?B. ?S a ?A} => {?S a ?B}.
{?P rdfs:subPropertyOf ?R. ?S ?P ?O} => {?S ?R ?O}.
{?P owl:inverseOf ?Q. ?S ?P ?O} => {?O ?Q ?S}.
{?P a owl:SymmetricProperty. ?S ?P ?O} => {?O ?P ?S}.
{?P a owl:TransitiveProperty. ?X ?P ?O. ?S ?P ?X} => {?S ?P ?O}.
{?P a owl:FunctionalProperty. ?S ?P ?X. ?S ?P ?Y} => {?X = ?Y}.
{?P a owl:InverseFunctionalProperty. ?X ?P ?O. ?Y ?P ?O} => {?X = ?Y}.
{?L rdf:rest ?M. ?A owl:distinctMembers ?L} => {?A owl:distinctMembers 
?M}.
{?L rdf:first ?X; rdf:rest ?M. ?M :item ?Y. ?A owl:distinctMembers ?L} => 
{?X owl:differentFrom ?Y}.
{?C owl:oneOf ?L. ?L :item ?X} => {?X a ?C}.
{?R a owl:Restriction; owl:onProperty ?P; owl:allValuesFrom ?A. ?X ?P ?Y; 
a ?R} => {?Y a ?A}.
 
{?L rdf:first ?I; a rdf:List} => {?L :item ?I}.
{?L rdf:rest ?R; a rdf:List. ?R :item ?I} => {?L :item ?I}.
##########################################################
 
 
and then we ask
 
##########################################################
@prefix q: <http://www.w3.org/2004/ql#>.
@prefix log: <http://www.w3.org/2000/10/swap/log#>.
@prefix owl: <http://www.w3.org/2002/07/owl#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix iso: <http://www.tc184-sc4.org/iso15926/part2/2003-12#> .
@prefix : <hans#>.
 
[]
q:select {?X :accordingTo iso:norm};
q:where  {?X a iso:DirectConnection;
             :side1 ?S1;
             :side2 ?S2.
          ?S1 a iso:PhysicalObject, iso:PossibleIndividual.
          ?S2 a iso:PhysicalObject, iso:PossibleIndividual}.
##########################################################
 
 
and get as answer
 
##########################################################
     @prefix : <hans#> .
     @prefix iso: <http://www.tc184-sc4.org/iso15926/part2/2003-12#> .
 
    :direct_connection     :accordingTo iso:norm .
##########################################################
 
of course, this could also be directly obtained when you take as input
iso:PhysicalObject rdfs:subClassOf iso:PossibleIndividual.
but we wanted to test that iso:PossibleIndividual followed from owl rules
as you can see in the following proof trace
 
##########################################################
{{:direct_connection a iso:DirectConnection} e:evidence 
<file:/temp/hans.n3#_14>. 
 {:direct_connection :side1 :flange_on_pump_P-101} e:evidence 
<file:/temp/hans.n3#_15>. 
 {:direct_connection :side2 :flange_on_pipe_A-265-h} e:evidence 
<file:/temp/hans.n3#_16>. 
 {:flange_on_pump_P-101 a iso:PhysicalObject} e:evidence 
<file:/temp/hans.n3#_11>. 
 {{:R1 a owl:Restriction} e:evidence <file:/temp/hans.n3#_18>. 
  {:R1 owl:onProperty :side1} e:evidence <file:/temp/hans.n3#_19>. 
  {:R1 owl:allValuesFrom iso:PossibleIndividual} e:evidence 
<file:/temp/hans.n3#_20>. 
  {:direct_connection :side1 :flange_on_pump_P-101} e:evidence 
<file:/temp/hans.n3#_15>. 
  {:direct_connection a :R1} e:evidence <file:/temp/hans.n3#_14>} 
e:sequent {
 {:flange_on_pump_P-101 a iso:PossibleIndividual} e:evidence 
<file:/temp/hans.n3#_50>}. 
 {:flange_on_pipe_A-265-h a iso:PhysicalObject} e:evidence 
<file:/temp/hans.n3#_12>. 
 {{:R2 a owl:Restriction} e:evidence <file:/temp/hans.n3#_22>. 
  {:R2 owl:onProperty :side2} e:evidence <file:/temp/hans.n3#_23>. 
  {:R2 owl:allValuesFrom iso:PossibleIndividual} e:evidence 
<file:/temp/hans.n3#_24>. 
  {:direct_connection :side2 :flange_on_pipe_A-265-h} e:evidence 
<file:/temp/hans.n3#_16>. 
  {:direct_connection a :R2} e:evidence <file:/temp/hans.n3#_14>} 
e:sequent {
 {:flange_on_pipe_A-265-h a iso:PossibleIndividual} e:evidence 
<file:/temp/hans.n3#_50>}} e:sequent {
{:direct_connection :accordingTo iso:norm} e:evidence 
<http://www.w3.org/2002/07/owl#kb>}. 
 
# Proof found for _:engine_1 in 5732 steps (139770 steps/sec) using 1 
engine (50 triples)
##########################################################
 
 
will need some more time to understand more details of your work..
also, when I converted your ontology-for-data-model.rdf into N3
I found a lot of typed literals clashes such as ""^^xsd:nonNegativeInteger
but is definitely interesting work :)
 
-- 
Jos De Roo, AGFA http://www.agfa.com/w3c/jdroo/
 
[1] http://www.w3.org/2000/10/swap/doc/
[2] http://www.w3.org/2000/10/swap/doc/cwm.html
[3] http://eulersharp.sourceforge.net/
 
 
 
 
 
"Hans Teijgeler" <hans.teijgeler@quicknet.nl>
Sent by: semantic-web-request@w3.org
18/08/2005 14:49
 
 
        To:     <semantic-web@w3.org>
        cc:     (bcc: Jos De_Roo/AMDUS/MOR/Agfa-NV/BE/BAYER)
        Subject:        OWL Full reasoning
 
 
Hi,
 
I have worked out an example of a reasoning problem that we have:
http://www.infowebml.ws/topics/RDF-OWL/85-reasoning/example.htm
 
I have the following questions to the OWL community:
1.      Given the fact that this is clearly an implementation of OWL Full, 

can any 
OWL reasoner handle this at present? 
2.      If not yet, may we realistically expect such a capability to be 
available 
by the year 2010? 
3.      And if not, why is there OWL Full?
 
Regards,
Hans
 
_______________________ 
Hans Teijgeler
ISO 15926 specialist
www.InfowebML.ws
hans.teijgeler@quicknet.nl
phone +31-72-509 2005

Received on Saturday, 20 August 2005 10:20:03 UTC