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RE: cardinality=0?1 - OWL Lite

From: Danny Ayers <danny666@virgilio.it>
Date: Wed, 18 Jun 2003 15:48:47 +0200
To: "Peter Vojnisek" <et@progos.hu>, <www-rdf-interest@w3.org>
Message-ID: <BKELLDAGKABIOCHDFDBPOEGCDBAA.danny666@virgilio.it>


> 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

Cheers,
Danny.


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http://dannyayers.com 
Received on Wednesday, 18 June 2003 09:52:12 GMT

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