Re: [topbraid-users] automatic classification?

Mon, 16 Feb 2015 06:57:08 -0800

I didn't see this until later - this is precisely the same approach.

-- Scott

On 2/16/2015 4:25 AM, David Price wrote:
I think some of the commercial reasoners can handle this, but you’d need to investigate that yourself.

However, the example given is trivial to write using a SPIN rule on the superclass X to construct a rdf:type statements referencing the subclass XSmall for all instances of X where length < 10 - something like

CONSTRUCT { ?this a ex:Xsmall . }
WHERE {
?this ex:length ?length .
FILTER(?length < 10 )
}.

If you need this as a general capability, and want to define things in OWL but use SPIN for inference then seems like you could probably construct the model SPIN rules by writing meta-model SPIN rules on owl:Restriction, etc. reading the OWL itself looking for cases of <, >, = , <= !=, >=, etc being used in the restriction of datatype properties with simple XSD datatype ranges.

Cheers,
David

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On 16 Feb 2015, at 08:16, Bohms, H.M. (Michel) <[email protected]> wrote:

Hi Holger
 
Ok, thx. Could you give me a hint on how to do this with SPIN or would it really require an extension of spin itself?
Guess it a kind of global spin rule you would attach to “any individual” iso to a class?
 
 
Dr. ir. H.M. (Michel) Bohms
Sr. Research Scientist
Structural Reliability
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From: [email protected] [mailto:[email protected]] On Behalf Of Holger Knublauch
Sent: donderdag 12 februari 2015 1:12
To: [email protected]
Subject: Re: [topbraid-users] automatic classification?
 
I don't think any of the built-in reasoners of TopBraid understand custom datatypes. It should be a doable extension to the SPIN OWL RL model, similar how spinowl.ttl already supports constraint checking on such user-defined datatypes.

Holger


On 2/11/2015 23:13, Bohms, H.M. (Michel) wrote:
Suppose i have a class X and subclass XSmall
And property length
 
I define for XSmall an equivalentclass: (X and  (length only xsd:float[< "10"^^xsd:float]))
 
 
I now have an instance of X being x with value 5 for length
 
What reasoner do I have to run to infer: x rdf:type XSmall?
 
Or am I doing something wrong in principle….
 
(swiftowlim is in my scenario…)
 
Thx michel
 
 
Dr. ir. H.M. (Michel) Bohms
Sr. Research Scientist
Structural Reliability
T +31 (0)88 866 31 07
M +31 (0)63 038 12 20
E [email protected]
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