회신: 회신: Questi on about SWRL built-in "hasNumberOfPropertyValues"‏ ‏‏

So I'm struggling with SQWRL several days and couldn't implement what I want to.

The thing I want to implement is like this.

"Polygon(?p) ∧ hasSide(?p, ?v) ∧ sqwrl:makeSet(?s, ?v) ∧ sqwrl:size(3, ?s) → Triangle(?p)"

That way, I will be able to classify instances according to the number of relation with other type of instances.

However, when I tested the above statement with a small owl files, it gives error as below.
(I tried several versions of protege including 3.4.6, 3.4.8, 3.5)

1. when I added the rule describing the above statement and run reasoner,
    it gives an error saying "Cannot convert rule DefaultSWRLImp("name of rule" of [DefaultOWLNamedClass(http://www.w3.org/2003/11/swrl#Imp)])
    (same error with the SQWRL example provided)

2. when I use SQWRLQueryTab and run the above statement,
    it gives an error saying that "Exception when running SQWRL query "name of rule": error running SQWRL queries: error running rule engine: error inserting OWL axioms into Drools(or Jess) rule engine: null

Are there anything wrong in my implementation? or SQWRL is not capable of realizing the concept I want to realize?

Regards,

SungKu Kang

________________________________________
보낸 사람: Samson Tu [[email protected]] 대신 [email protected] [[email protected]]
보낸 날짜: 2013년 8월 1일 목요일 오전 11:54
받는 사람: [email protected]
제목: Re: [protege-discussion] 회신:  Question about SWRL built-in "hasNumberOfPropertyValues"‏‏‏

No, SQWRL built-ins can be used on the LHS of a rule too.

The sqwrl construct I gave in the last message was wrong. A correct
example is

a(B_8, ?value)  ∧ sqwrl:makeSet(?s, ?value)  ∧ sqwrl:size(2, ?s)
   → b(?value, B_9)

Samson

On 7/31/2013 10:43 PM, Kang, Sungku wrote:
> As far as I know, SQWRL built-in primitives can only be used for the result (after ->) so it would not help reasoning based on the cardinality but just help querying existing information.
>
> Therefore, since hasNumberOfPropertyValues is no longer supported, there is no primitive supporting reasoning based on the cardinality (which is only available on closed world assumption) with SWRL.
>
> Am I right?
>
> If there's another way to implement the reasoning based on the cardinality or use previous version of SWRL (which has hasNumberOfPropertyValues), please let me know.
>
> Regards,
>
> SungKu
> ________________________________________
> 보낸 사람: Samson Tu [[email protected]] 대신 [email protected] [[email protected]]
> 보낸 날짜: 2013년 7월 31일 수요일 오후 6:23
> 받는 사람: [email protected]
> 제목: Re: [protege-discussion] Question about SWRL built-in "hasNumberOfPropertyValues"‏‏‏
>
> I don't find hasNumberOfPropertyValues documented in the
> SWRLAboxBuiltIns wiki page. I assume the built-in is no longer supported.
>
> You can duplicate the functionality of hasNumberOfPropertyValues using
> the sqwrl:count(..) built-in.
>
> hasNumberOfPropertyValues(3, AnInstance, aProperty) is exactly the same as
>
> aProperty(AnInstance, ?value) and sqwrl:count(3, ?value)
>
>
> Samson
>
>
> On 7/31/2013 1:39 PM, Kang, Sungku wrote:
>> To whom it may concern,
>>
>> My name is SungKu, who's working as a graduate research assistant in UIUC.
>>
>> I'd like to perform reasoning based on the number of object related
>> through a certain property,
>>
>> so I need to use SWRL built-in "hasNumberOfPropertyValues" in abox of
>> SWRL built-in.
>>
>> However, I couldn't write a rule using "hasNumberOfPropertyValues" even
>> though abox is imported properly.
>> (I tried this with both latest version of protege, 4.3 and the old
>> version of protege, 3.4)
>>
>> Here's my question for the issue.
>>
>> 1. I know that "hasNumberOfPropertyValues" has risk to modify existing
>> information of ontology.
>>       So, "hasNumberOfPropertyValues" has been deprecated because of the
>> issue?
>>       If so, are there any way to use old version of built-in, which has
>> "hasNumberOfPropertyValues"?
>>
>> 2. If it is not deprecated, is there any way to use it?
>>
>> 3. If it is deprecated and old version is not accessible, is there any
>> alternative for "hasNumberOfPropertyValues"
>>       in the current built-in?
>>
>> If you are not able to help me, please let me know the person I can
>> contact for the issue.
>>
>> Thank you for your help and I hope you have a nice day!
>>
>> Regards,
>>
>> Kang, SungKu
>>
>>
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