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Ah!
In this case, it would be better to define an independet property

foo:myProperty a owl:ObjectProperty ;
	rdfs:domain gr:ProductOrService ;
	rdfs:range  [ a owl:Class;
		      owl:unionOf (gr:QuantitativeValue gr:QualitativeValue) ] .

This would be the much cleaner approach, since with your approach, the range of the property is the intersection of gr:QuantitativeValue and gr:QualitativeValue, which is empty.

The only downside of my proposal is that the property will not be replicated from product models to products by the GoodRelations Axioms,

    http://wiki.goodrelations-vocabulary.org/Axioms#Product_Models

But you could simply modify the axiom to cater for that.

Martin


On Nov 13, 2012, at 6:03 AM, François-Paul Servant wrote:

> Dear Martin,
> 
> I'm sorry, because I messed up things in my first post. I didn't want to ask about gr:qualitativeProductOrServiceProperty
> vs gr:datatypeProductOrServiceProperty, but vs gr:quantitativeProductOrServiceProperty. They both are subproperties of owl:ObjectProperty
> 
> fps
> 
> Le 13 nov. 2012 à 11:22, Martin Hepp <martin.hepp at ebusiness-unibw.org> a écrit :
> 
>> Dear François-Paul:
>> 
>> The modeling proposed turns your ontology into OWL Full, since 
>> 
>>  gr:qualitativeProductOrServiceProperty
>> 
>> is a subproperty of owl:ObjectProperty while
>> 
>>  gr:datatypeProductOrServiceProperty
>> 
>> is a subproperty of owl:DatatypeProperty, and in OWL DL, no property can be both.
>> 
>> If you need to model the case that people should use RDF literals (text, number, whatsoever) and URIs of enumerated values, you could define a subproperty of 
>> 
>>  gr:datatypeProductOrServiceProperty
>> 
>> and set the range to rdfs:Literal.
>> 
>> This would allow all typed and untyped RDF Literals, which includes xsd:anyURI for URIs.
>> 
>> A similar pattern can also be used when the values of URIs include classes and individuals and you don't want to break OWL DL.
>> 
>> Best
>> 
>> Martin Hepp
>> 
>> On Nov 13, 2012, at 4:40 AM, Bene Rodriguez wrote:
>> 
>>> Hi François-Paul,
>>> 
>>> In principle, it is NOT OK for a property to be a subproperty of both
>>> gr:qualitative-, and gr:quantitativeProductOrServiceProperty.
>>> 
>>> These two properties, (or rather their expected values, an instance of
>>> the class gr:Qualitative-, gr:QuantitativeValue respectively) are
>>> intended to be disjoint or mutually exclusive by definition.
>>> 
>>> In case it helps, there is more info about the typical usage of these
>>> properties and their expected values on the GoodRelations wiki:
>>> - http://www.heppnetz.de/ontologies/goodrelations/v1.html#qualitativeProductOrServiceProperty
>>> - http://www.heppnetz.de/ontologies/goodrelations/v1#quantitativeProductOrServiceProperty
>>> - http://www.heppnetz.de/ontologies/goodrelations/v1#QualitativeValue
>>> - http://www.heppnetz.de/ontologies/goodrelations/v1#QuantitativeValue
>>> 
>>> I could point to many more usage examples of these two properties if needed.
>>> 
>>> Also, in case you can share, it would be interesting to know the
>>> modeling problem that you were trying to represent via this
>>> hypothetical subproperty of both gr:qualitative-, and
>>> gr:quantitativeProductOrServiceProperty.
>>> 
>>> Best,
>>> Bene Rodriguez
>>> -- 
>>> Research Associate
>>> E-Business and Web Science Research Group
>>> Department of General Management and E-Business
>>> Universitaet der Bundeswehr Munich (Germany)
>>> phone: +49 89 6004-2849
>>> email: benedicto.rodriguez at ebusiness-unibw.org
>>> web:   http://purl.org/beroca
>>> 
>>> On Tue, Nov 13, 2012 at 8:32 AM, François-Paul Servant
>>> <fps at semanlink.net> wrote:
>>>> Oops,
>>>> 
>>>> I messed things up when writing my question. Here is what I wanted to ask:
>>>> 
>>>> is it OK for a property used to describe a product to be subProperty of both gr:qualitativeProductOrServiceProperty and gr:quantitativeProductOrServiceProperty?
>>>> (I hope it is)
>>>> 
>>>> fps
>>>> 
>>>> Le 13 nov. 2012 à 00:32, François-Paul Servant <fps at semanlink.net> a écrit :
>>>> 
>>>>> Hi,
>>>>> is it OK for a property used to describe a product to be subClass of both gr:qualitativeProductOrServiceProperty and gr:datatypeProductOrServiceProperty?
>>>>> (I hope it is)
>>>>> Best,
>>>>> fps
>>>> 
>>>> 
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>>> 
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>> 
>> 
>> 
>> --------------------------------------------------------
>> martin hepp
>> e-business & web science research group
>> universitaet der bundeswehr muenchen
>> 
>> e-mail:  hepp at ebusiness-unibw.org
>> phone:   +49-(0)89-6004-4217
>> fax:     +49-(0)89-6004-4620
>> www:     http://www.unibw.de/ebusiness/ (group)
>>        http://www.heppnetz.de/ (personal)
>> skype:   mfhepp 
>> twitter: mfhepp
>> 
>> Check out GoodRelations for E-Commerce on the Web of Linked Data!
>> =================================================================
>> * Project Main Page: http://purl.org/goodrelations/
>> 
>> 
>> 
> 
> 
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--------------------------------------------------------
martin hepp
e-business & web science research group
universitaet der bundeswehr muenchen

e-mail:  hepp at ebusiness-unibw.org
phone:   +49-(0)89-6004-4217
fax:     +49-(0)89-6004-4620
www:     http://www.unibw.de/ebusiness/ (group)
         http://www.heppnetz.de/ (personal)
skype:   mfhepp 
twitter: mfhepp

Check out GoodRelations for E-Commerce on the Web of Linked Data!
=================================================================
* Project Main Page: http://purl.org/goodrelations/