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OWL DL, rdfs:Literal as range value, Reference vs. S&AS

From: Benjamin Nowack <bnowack@appmosphere.com>
Date: Tue, 10 Feb 2004 13:01:47 +0100
To: public-webont-comments@w3.org
Message-ID: <PM-EH.20040210130147.72329.1.1D@>


working on an OWL editor/species serializer I'm a little
bit confused about using rdfs:Literal for DatatypeProps. The
S&AS doc [1] mentions

dataRange ::= datatypeID | 'rdfs:Literal'

but in the reference doc [2] the rdfs:Literal option was removed
from the WD in the august 2003 CR version (After comments from 
RDF Core IIRC). The "Parsing OWL in RDF/XML" note [3] seems to 
ignore rdfs:Literal as well, but I'm not sure on that.

Furthermore, the validators from
Manchester [4] and Pellet [5] both complain:

Mindswap, Pellet:
"Non OWL-DL features used
http://www.w3.org/2000/01/rdf-schema#Literal is an unknown datatype"

Manchester/Karlsruhe, OWL Ontology Validator
"Undefined Datatype: http://www.w3.org/2000/01/rdf-schema#Literal"

The vOWLidator at http://owl.bbn.com/validator/ is fine but I don't
know if it does species checking.

I guess it's too late for doc changes but thought this issue
might be of interest. (will send a copy to www-rdf-logic as well).
Maybe this is not an issue at all (a rdfs:Literal range for a 
datatype property doesn't really add information..), but I wonder
how to "translate" an rdf:Property with rdfs:range=rdfs:Literal to
an owl:DatatypeProperty with rdfs:range=??. Simply drop the range?
Or can I keep it because the validators are just incomplete and 
the rdf/xml is DL-ok?

thanx in advance,

Benjamin Nowack

Kruppstr. 82-100
45145 Essen, Germany

[1] http://www.w3.org/TR/owl-semantics/syntax.html
[2] http://www.w3.org/TR/owl-ref/#Datatype
[3] http://www.w3.org/TR/2004/NOTE-owl-parsing-20040121/
[4] http://phoebus.cs.man.ac.uk:9999/OWL/Validator
[5] http://www.mindswap.org/2003/pellet/demo.shtml
Received on Tuesday, 10 February 2004 07:03:45 UTC

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