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[closed] RE: OWL comment - owl:OntologyProperty

From: Jim Hendler <hendler@cs.umd.edu>
Date: Fri, 27 Jun 2003 08:58:51 -0400
Message-Id: <p05200f47bb21eff6f361@[10.0.1.2]>
To: "'Guus Schreiber'" <schreiber@cs.vu.nl>
Cc: public-webont-comments@w3.org

thanks for your comment.

At 9:14 AM +0100 6/27/03, Dickinson, Ian J wrote:
>Hi Jim,
>I accept this resolution of the issue I raised.
>
>Thanks,
>Ian
>
>>  -----Original Message-----
>>  From: Jim Hendler [mailto:hendler@cs.umd.edu]
>>  Sent: 26 June 2003 01:16
>>  To: Dickinson, Ian J; 'Guus Schreiber'
>>  Cc: public-webont-comments@w3.org
>>  Subject: RE: OWL comment - owl:OntologyProperty
>>
>>
>>  At 5:19 PM +0100 5/9/03, Dickinson, Ian J wrote:
>>  >Hi Guus,
>>  >Thanks for your response.  I assumed that, presuming it
>>  wasn't just an
>>  >accidental editorial artefact in as&s, OntologyProperty was
>>  a variant
>>  >on AnnotationProperty, in that it is not allowed in property
>>  axioms.
>>  >Do the updated documents explain why both AnnotationProperty and
>>  >OntologyProperty are needed?  ISTM that plurality of
>>  property types is
>>  >potentially confusing to users of the language, especially if the
>>  >differences between them are slim, and come down to nuances of the
>>  >semantic treatment.
>>  >
>>  >Cheers,
>>  >Ian
>>
>>  Hi Ian
>>
>>  After further reflection the WG has modified the rules in
>>  S&AS concerning owl:OntologyProperty. In the S&AS editors
>>  draft:
>>  http://www-db.research.bell-labs.com/user/pfps/owl/semantics/s
>>  yntax.html#2.3.1.3
>>  we read:
>>
>>  axiom ::=
>>  ....
>>      | 'OntologyProperty(' ontologyPropertyID { annotation } ')'
>>
>>  which permits user defined ontology properties.
>>
>>  In the OWL Reference editors draft, this is recorded with these words:
>>
>>  http://www.daml.org/2002/06/webont/owl-ref-proposed#Ontology-def
>>  [[
>>  NOTE: The ontology-import construct owl:imports and the
>>  ontology-versioning constructs owl:priorVersion,
>>  owl:backwardCompatibleWith and owl:inCompatibleWith are
>>  defined in the OWL vocabulary as instances of the OWL
>>  built-in class owl:OntologyProperty. Instances of
>>  owl:OntologyProperty must have the class owl:Ontology as
>>  their domain and range. It is permitted to define other
>>  instances of owl:OntologyProperty. ]]
>>
>>  >  Do the
>>  >  updated documents explain why both AnnotationProperty and
>>  > OntologyProperty  are needed?
>>
>>  Perhaps not, we feel this would give them undue weight.  The reason
>>  is to ensure that all OWL DL entailments are also OWL Full
>>  entailments.
>>
>>  >  ISTM that plurality of property types is potentially confusing  to
>>  > users of the language, especially if the differences
>>  between them are
>>  > slim, and come down to nuances of the semantic treatment.
>>
>>  Yes, this is potentially confusing, we hope the new note above helps
>>  clarify the situation,
>>
>>  In summary we have accepted your comment that:
>>  [[
>>  This class does not seem to be referenced or
>>  defined anywhere else in the specs (including in owl.owl),
>>  and it is not clear what it is representing or what role it
>>  is playing. ]] by adding text to OWL Reference.
>>
>>  Please let us know, cc-ing public-webont-comments@w3.org,
>>  whether this response is satisfactory.
>>
>>  Thanks for your comment
>>
>>
>>
>>  --
>>  Professor James Hendler
>>  hendler@cs.umd.edu
>>  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)
>>  http://www.cs.umd.edu/users/hendler      *** NOTE CHANGED
>>  CELL NUMBER ***
>>

-- 
Professor James Hendler				  hendler@cs.umd.edu
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)
http://www.cs.umd.edu/users/hendler      *** NOTE CHANGED CELL NUMBER ***
Received on Friday, 27 June 2003 08:58:59 GMT

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