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Fwd: OWL issue: constraining members of a container in OWL:DL

From: Jim Hendler <hendler@cs.umd.edu>
Date: Tue, 17 Feb 2004 17:45:57 -0500
Message-Id: <p060204c9bc584904c269@[]>
To: webont <www-webont-wg@w3.org>

This came to the public webont comments list -- I would normally have 
suggested that this go to the public discussion lists, but then I 
noticed his comment at the bottom -- an LC comment to RDF was that 
they should provide a mechanism to constrain the members of an 
rdf:seq.  The RDF Core WG answered that OWL would be expected to 
provide something like this, but didn't report that to our WG -- as a 
result, we didn't address this -- I think we should write a more 
careful response - probably directing him to the places in our 
reference where we discuss the use of ordered lists in OWL -- anyone 
want to draft a response?  I don't think it needs WG review, but in 
my opinion we shouldn't just blow off this comment given its history.
  Anyone want to take a swipe at it?

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>Thread-Topic: OWL issue: constraining members of a container in OWL:DL
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>From: "Stephane Fellah" <fellah@pcigeomatics.com>
>To: <public-webont-comments@w3.org>
>Subject: OWL issue: constraining members of a container in OWL:DL
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>I am currently trying to define some rules to convert UML to OWL. For
>property of cardinality n and for which order is important, I want to
>use rdf:Seq. I would like to constraint the member of the rdf:Seq to a
>specific type (such as xs:String or a particular Class).
>Example: Here how an Address is expressed in ISO 19115.
>           xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" >
>  <rdf:Address rdf:nodeID="urn:pcigeomatics:hull-office">
>     <iso19115:deliveryPoint>
>       <rdf:Seq>
>         <rdf:li>PCI Geomatics Inc</rdf:li>
>         <rdf:li>490, Boulevard St Joseph</rdf:li>
>         <rdf:li>Suite 400</rdf:li>
>       </rdf:Seq>
>     </iso19115:deliveryPoint>
>     <iso19115:postalCode>J8Y  3Y7</iso19115:postalCode>
>     <iso19115:city>Hull</iso19115:city>
>     <iso19115:administrativeArea>Quebec</iso19115:administrativeArea>
>     <iso19115:country>Canada</iso19115:country>
>   </rdf:Address>
>The order of the deliveryPoint address is important in this case (think
>about printing a label for the address).I would like to express in
>OWL-DL that deliveryPoint property is rdf:Seq has take only xs:String or
>rdfs:Literal for its member.
>It seems that it is not possible to do this in OWL-DL. Correct me if I
>am wrong. I think this is major flaw in OWL-DL if it is not supported
>because this scenario can occur many times.
>Note that this issue has been raised in RDFS discussion and has been
>forwarded to the ontology WG. It seems that this issue has not been
>addressed. Ref:
>Any suggestions to solve this problem are welcome.
>Best regards
>Stephane Fellah
>Senior Software Engineer
>PCI Geomatics
>490, Boulevard St Joseph
>Hull, Quebec
>Canada J8Y 3Y7
>Tel: 1 819 770 0022 Ext. 223
>Fax 1 819 770 0098
>Visit our web site:  www.pcigeomatics.com
Professor James Hendler			  http://www.cs.umd.edu/users/hendler
Director, Semantic Web and Agent Technologies	  301-405-2696
Maryland Information and Network Dynamics Lab.	  301-405-6707 (Fax)
Univ of Maryland, College Park, MD 20742	  240-277-3388 (Cell)
Received on Tuesday, 17 February 2004 17:45:59 UTC

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