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[protege-owl] Comparing individuals

Martin O'Connor martin.oconnor at stanford.edu
Mon Aug 6 13:31:03 PDT 2007


If you are going to discover these similarities then, yes, SWRL would be 
appropriate.

Martin

Ely Edison Matos wrote:

>Thanks, Martin,
>I'm converting some xml files to owl ontologies. This "individual ontology"
>will be merged. Only after merge I can compare to find "identical"
>individuals, based on the values of properties...it means, the similarity
>will be "discovered", not "defined", so i can't use the sameAs construct...I
>think that is the case of use SWRL after merge to test the properties and
>feed another property (as a "isSameAs" property, maybe). What do you think?
>
>Thanks,
>Ely
>
>----- Original Message ----- 
>From: "Martin O'Connor" <martin.oconnor at stanford.edu>
>To: "User support for the Protege-OWL editor"
><protege-owl at lists.stanford.edu>
>Sent: Monday, August 06, 2007 3:37 PM
>Subject: Re: [protege-owl] Comparing individuals
>
>
>  
>
>>You can use the owl:sameAs construct:
>>
>>  <Unit rdf:ID="meter">
>>    <owl:sameAs>
>>      <Unit rdf:ID="metre"/>
>>    </owl:sameAs>
>>  </Unit>
>>
>>In the Protege-OWL GUI, owl:sameAs can be accessed by switching to the
>>triples view in the individuals tab.
>>
>>You could also do it in SWRL with a rule of the form:
>>
>>-> sameAs(meter, metre)
>>
>>though it makes more sense to do it directly in OWL.
>>
>>Martin
>>
>>
>>Ely Edison Matos wrote:
>>
>>    
>>
>>>Hello semantic fellows,
>>>I have a begginer's doubt, i hope you can help. I need to know thar 2
>>>individuals are "equals" or "the same" or "equivalent" in a owl
>>>ontology. Sample:
>>>
>>>  <owl:Ontology rdf:about=""/>
>>>  <owl:Class rdf:ID="Measure"/>
>>>  <owl:Class rdf:ID="Unit"/>
>>>  <owl:ObjectProperty rdf:ID="measures">
>>>    <rdfs:range rdf:resource="#Measure"/>
>>>    <rdfs:domain rdf:resource="#Unit"/>
>>>  </owl:ObjectProperty>
>>>  <Unit rdf:ID="meter">
>>>    <measures>
>>>      <Measure rdf:ID="distance"/>
>>>    </measures>
>>>  </Unit>
>>>  <Unit rdf:ID="metre">
>>>    <measures rdf:resource="#distance"/>
>>>  </Unit>
>>>
>>>How can I test (or "discover") that "meter" and "metre" are the same
>>>(cause it shares the same value to ObjectProperty, in this case). Do i
>>>need a some closure at class definition? Can I use a reasoner or SWRL?
>>>
>>>Thanks,
>>>Ely
>>>Master Degree Student
>>>Juiz de Fora - Brazil
>>>
>>>------------------------------------------------------------------------
>>>
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