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Re: Any objections against using xsd:anySimpleType or rdfs:Literal as the rdfs:range for OWL datatype properties?

From: Martin Hepp <martin.hepp@ebusiness-unibw.org>
Date: Thu, 23 Sep 2010 20:51:17 +0200
Cc: Martin Hepp <martin.hepp@ebusiness-unibw.org>
Message-Id: <B78B3FFA-0847-4ADB-A87C-940FE71F0D20@ebusiness-unibw.org>
To: nathan@webr3.org, semantic-web@w3.org, public-lod@w3.org
NB:

It seems that OWL 2 supports

DataUnionOf( xsd:float xsd:decimal )

The question is how broadly current apps and repositories already  
support OWL 2, in particular "at Web scale", outside of small,  
controlled environments.

So I guess rdfs:Literal is the better choice for the moment.

Martin


On 23.09.2010, at 20:21, Martin Hepp wrote:

> Hi all:
> Thanks! So I understand that for an owl:DatatypeProperty that may  
> hold xsd:float, xsd:integer, xsd:int, xsd:double, or xsd:decimal  
> values, the simplest solution is rdfs:Literal.
>
> Is that correct?
>
> xsd:decimal would include xsd:integer and xsd:int (?), but there is  
> no standard datatype that defines the union of float/double/decimal.
>
> Any other solutions?
>
> Best
>
> Martin
>
>
> On 23.09.2010, at 14:59, Nathan wrote:
>
>> Martin Hepp wrote:
>>> Dear all:
>>> Are there any theoretical or practical problems caused by defining  
>>> the range of an owl:DatatypeProperty as
>>> http://www.w3.org/2001/XMLSchema#anySimpleType
>>
>> RDF Semantics has a good discussion on this at:
>> http://www.w3.org/TR/rdf-mt/#dtype_interp
>>
>> note that:
>> "The other built-in XML Schema datatypes are unsuitable for various  
>> reasons, and SHOULD NOT be used: xsd:duration does not have a well- 
>> defined value space (this may be corrected in later revisions of  
>> XML Schema datatypes, in which case the revised datatype would be  
>> suitable for use in RDF datatyping); xsd:QName and xsd:ENTITY  
>> require an enclosing XML document context; xsd:ID and xsd:IDREF are  
>> for cross references within an XML document; xsd:NOTATION is not  
>> intended for direct use; xsd:IDREFS, xsd:ENTITIES and xsd:NMTOKENS  
>> are sequence-valued datatypes which do not fit the RDF datatype  
>> model."
>>
>> Because a range of xsd:anySimpleType effectively includes/allows  
>> the use of xsd:duration and the aforementioned then it may not be  
>> the best range.
>>
>> All "afaict" :) Best,
>>
>> Nathan
>>
>
>
Received on Thursday, 23 September 2010 18:52:19 GMT

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