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Re: Comment on POWDER WDR, 2008-06-30: POWDER-S interpretation of tagset

From: Ivan Herman <ivan@w3.org>
Date: Thu, 03 Jul 2008 17:33:18 +0200
Message-ID: <486CF13E.2060006@w3.org>
To: Ivan Herman <ivan@w3.org>, public-powderwg@w3.org
I stand corrected:-) I still get mixed up by DL time-to-time:-(

Ivan

Stasinos Konstantopoulos wrote:
> On Thu Jul  3 13:50:36 2008 Ivan Herman said:
> 
>> Comment on http://www.w3.org/TR/2008/WD-powder-dr-20080630/
>>
>> Example 2-13.
>>
>> I am not sure that the translation of the tagset leads to a meaningful  
>> Class. In the class definition of tagset_1 we have an intersection of  
>> thee restrictions; all three refers to the _same_ property but with  
>> different values. Isn't the intersection then empty?
> 
> Not at all, the intersection has all three values for the same
> property as wdr:tag is not a functional property.
> 
> To make this more concrete, in the attached exIvan.owl try running this
> query: 
> 
>  SELECT ?x ?y WHERE { ?x <http://www.test.org/ontology.owl#tag> ?y }
> 
> Pellet happily answers:
> 
> Query Results (4 answers):
> x                 | y
> =========================================
> ontology:website1 | "tag1"^^xsd:string
> ontology:website2 | "tag2"^^xsd:string
> ontology:website2 | "my tag3"^^xsd:string
> ontology:website2 | "tag1"^^xsd:string
> 
> 

-- 

Ivan Herman, W3C Semantic Web Activity Lead
Home: http://www.w3.org/People/Ivan/
PGP Key: http://www.ivan-herman.net/pgpkey.html
FOAF: http://www.ivan-herman.net/foaf.rdf

Received on Thursday, 3 July 2008 15:33:50 GMT

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