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Re: cardinality=0?1 - OWL Lite

From: Peter Vojnisek <et@progos.hu>
Date: Wed, 18 Jun 2003 16:29:26 +0200
Message-ID: <3EF07746.2060000@progos.hu>
To: www-rdf-interest@w3.org

>
>
>>A paragraph from http://www.w3.org/TR/owl-guide/ :
>>Cardinality expressions with values limited to 0 or 1 are part of OWL 
>>Lite. This permits the user to indicate 'at least one', 'no more than 
>>one', and 'exactly one'. Positive integer values other than 0 and 1 are 
>>permitted in OWL DL. owl:maxCardinality can be used to specify an 
>>/upper/ bound. owl:minCardinality can be used to specify a /lower/ 
>>bound. In combination, the two can be used to specify a /range/.
>>
>>which cardinality value means 'at least one', 'no more than one', or 
>>'exactly one'?
>>    
>>
>
>Wouldn't those be:
>
>'at least one'
>X minCardinality 1
>
>'no more than one'
>X maxCardinality 1
>
>'exactly one'
>X cardinality 1
>or
>X minCardinality 1,
>X maxCardinality 1
>
>see 
>http://www.w3.org/TR/owl-features/#s3.5
>  
>
Thanks, it looks fine, i thought i was able to use Cardinality only (not 
maxCardinality nor minCardinality).
In that case what does maxCardinality=0 or Cardinality=0 mean?

Cheers,
Peter
Received on Wednesday, 18 June 2003 10:28:11 GMT

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