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[protege-owl] owl:hasValue

Steve Wilder steven.m.wilder at lmco.com
Thu May 29 12:47:38 PDT 2008


Thomas Russ wrote:
> On May 29, 2008, at 8:22 AM, Steve Wilder wrote:
> 
>> Also, I have trouble with the solution you recommended.
>>
>> I actually have multiple hasValue restrictions on AAR
>>
>> AAR <= hasAssociatedMissions has AEW_instance
>> AAR <= hasAssociatedMissions has ABC_instance
>> AAR <= hasAssociatedMissions has CAP_instance
>>
>> When I run myAAR.getHasValuesOnTypes(prop).size(), the return value is
>> 1, even though I'd expect it to be 3.
> 
> Well, that's a bit perplexing.
> 
> Unfortunately, setting up an environment to test this on my own is a  
> bit more work than I'm willing to do right now.
> 
> What values do you get when you look at the contents returned by  
> getHasValuesOnTypes?  Does it at least get one of the instances you  
> expect?

Yes, the first one.

35487  INFO  [main] testeval - AAR-1-4939 is associated with AEW_instance


> 
>> Steve
>>
>> Steve Wilder wrote:
>>> I like the automatic inference better.  I tried classifying the  
>>> taxonomy
>>> using a reasoner, but that didn't seem to do the trick.
>>>
>>> How can I get my protege server to do this kind of automatic  
>>> inference
>>> on hasValue?
>>>
>>> Steve
>>>
>>> Thomas Russ wrote:
>>>> On May 27, 2008, at 9:34 AM, Steve Wilder wrote:
>>>>
>>>>> I have a problem that I'm trying to diagnose.
>>>>>
>>>>> I have the following definition in OWL:
>>>>   AAR <= hasAssociatedMissions has AEW_instance
>>>>   ...
>>>>> If I create an instance of AAR in the Protege editor, the new  
>>>>> instance
>>>>> properly fills in the hasAssociatedMissions property with
>>>>> AEW_instance.
>>>> That is because the instance editor has a special purpose routine  
>>>> that
>>>> looks for fillers specified by hasValue restrictions on the  
>>>> instance.
>>>> In effect, there is some implicit inference done by the editor to
>>>> figure out the slot value.
>>>>
>>>>> However, when using the Protege client/server in my program, I'm  
>>>>> not
>>>>> seeing this property filled in correctly for any instances of AAR.
>>>>>
>>>>> AAR myAAR = myFactory.createAAR("myAAR");
>>>>> System.out.println("AAR: " + myAAR + " has associated missions: " +
>>>>> myAAR.getHasAssociatedMissions().size());
>>>>>
>>>>> returns:
>>>>>
>>>>> AAR: DefaultAAR(myAAR of [DefaultOWLNamedClass(aco:AAR,
>>>>> FrameID(12:12042
>>>>> 1))]) has associated missions: 0
>>>> That is because this does not do any inference.  It looks only at  
>>>> the
>>>> assserted information.
>>>>
>>>> You can get the hasValue restrictions by using the
>>>> "getHasValuesOnTypes" method.  Note that this is a moderately
>>>> expensive method to call.
>>>>
>>>> Ex:
>>>>
>>>>     OWLProperty prop =  
>>>> model.getOWLProperty("hasAssociatedMissions");
>>>>     myAAR.getHasValuesOnTypes(prop);
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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