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RE: Datatype Confusion

From: Smith, Michael K <michael.smith@eds.com>
Date: Tue, 4 Feb 2003 10:12:23 -0600
Message-ID: <B8E84F4D9F65D411803500508BE3221413862D33@USPLM207>
To: Raphael Volz <Volz@fzi.de>
Cc: webont <www-webont-wg@w3.org>


Raphael,  I basicly paraphrase the AS&S, include a table of types, 
and then reference the AS&S.  Other than agreeing that 'primitive' 
would be better than 'non-list' I don't see that much more needs
to be done.

- Mike

> OWL Guide Draft states: (
http://www.w3.org/2001/sw/WebOnt/guide-src/Guide.html )
> (3.2.2. Properties and Datatypes)

> "OWL uses some of the defined, non-list XML Schema datatypes. "
> what is non-list datatypes. This is proprietary terminology. Does
> non-list mean, primitive datatypes only ? The intended meaning
> may be understood after reading the appropriate section in
>
http://www-db-out.bell-labs.com/user/pfps/owl/semantics/syntax.html#owl-data
types
> I would advise to include this into the guide and say, that
> we are dealing with a subset of XML Primitive Datatypes, namely
> those depicted in the attached figure.




-----Original Message-----
From: Raphael Volz [mailto:Volz@fzi.de]
Sent: Tuesday, February 04, 2003 7:01 AM
To: www-webont-wg@w3.org
Subject: Datatype Confusion


Hi -

while trying to come up with the OWL API I stumbled over
the data type stuff and found several serious inconsistencies
in the document.

(A)
OWL Reference document states: ( Sec 7.1 )

OWL makes use of the RDF datatyping scheme, refers to [RDF Concepts,
http://www.w3.org/TR/2002/WD-rdf-concepts-20021108/ ]
which states (Sec 2.2.5) that
"RDF can use values represented according to XML schema
datatypes [XML-SCHEMA2]"
--> This would allow for Complex Datatypes

(B)
OWL Guide Draft states: (
http://www.w3.org/2001/sw/WebOnt/guide-src/Guide.html )
(3.2.2. Properties and Datatypes)

"OWL uses some of the defined, non-list XML Schema datatypes. "
what is non-list datatypes. This is proprietary terminology. Does
non-list mean, primitive datatypes only ? The intended meaning
may be understood after reading the appropriate section in
http://www-db-out.bell-labs.com/user/pfps/owl/semantics/syntax.html#owl-data
types
I would advise to include this into the guide and say, that
we are dealing with a subset of XML Primitive Datatypes, namely
those depicted in the attached figure.

(C) OWL AS+S
http://www-db.research.bell-labs.com/user/pfps/owl/semantics/syntax.html#owl
-datatypes
Took this as normative. Maybe give the appropriate section a title
and include figure.
I wonder how OWL can be fully compatible with RDF semantics if
RDF allows for the complete XMLS type system (including primitve list and
complex types)...


(D) Web Ontology Language (OWL) Test Cases (http://www.w3.org/TR/owl-test/)
No datatype related tests...
Received on Tuesday, 4 February 2003 11:15:59 GMT

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