isDefinedBy usage

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Bohms, H.M. (Michel)

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Nov 29, 2019, 3:56:47 AM11/29/19
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Could rdfs:isDefinedBy also have a single defined class/property as target for a subject?

 

Technically is seems ok (rdfs:resource range) but I see only uses where the target is a complete ontology...

 

Thx Michel

 

 

 

 

Dr. ir. H.M. (Michel) Böhms
Senior Data Scientist

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dprice

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Nov 29, 2019, 8:38:31 AM11/29/19
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Either end of isDefinedBy can be whatever you want. When used in OWL it’s annotation property so reasons, etc. ignore it.

Cheers,
David

On 29 Nov 2019, at 08:56, 'Bohms, H.M. (Michel)' via TopBraid Suite Users <topbrai...@googlegroups.com> wrote:

 
Could rdfs:isDefinedBy also have a single defined class/property as target for a subject?
 
Technically is seems ok (rdfs:resource range) but I see only uses where the target is a complete ontology...
 
Thx Michel
 
 
 
Dr. ir. H.M. (Michel) Böhms
Senior Data Scientist

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Irene Polikoff

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Nov 29, 2019, 9:05:22 AM11/29/19
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This is correct. If one looks at the spec defining this property, it says "indicates the resource defining the subject resource. As with rdfs:seeAlso, this property can be applied to any instance of rdfs:Resource and may have as its value any rdfs:Resource."

However, it is also true that by convention this property is used to identify a graph that defines a given resource. I also have not seen it used in any other way. One could say that the de facto practice gave this property a more limited/targeted semantic than stated in the spec.  It then becomes a matter of judgement whether to use it in a way that is different from this convention. 

Jan Voskuil

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Dec 2, 2019, 2:48:57 AM12/2/19
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The spec is very clear: "This property may be used to indicate an RDF vocabulary in which a resource is described."
If it is of any use: at KOOP, I use examples of rdfs:isDefinedBy to explain the notions of baseURI, owl:Ontology and namespace. URIs are "minted" in the graph where the corresponding resources are defined with a rdfs:isDefinedBy-statement with the graph as value. Next, the URIs can be reused elsewhere. Pseudo-authorative examples include rdfs, skos, dcterms, void and many, many others. -j

On Friday, November 29, 2019 at 3:05:22 PM UTC+1, Irene Polikoff wrote:
This is correct. If one looks at the spec defining this property, it says "indicates the resource defining the subject resource. As with rdfs:seeAlso, this property can be applied to any instance of rdfs:Resource and may have as its value any rdfs:Resource."

However, it is also true that by convention this property is used to identify a graph that defines a given resource. I also have not seen it used in any other way. One could say that the de facto practice gave this property a more limited/targeted semantic than stated in the spec.  It then becomes a matter of judgement whether to use it in a way that is different from this convention. 
On Nov 29, 2019, at 8:38 AM, dprice <dpr...@topquadrant.com> wrote:

Either end of isDefinedBy can be whatever you want. When used in OWL it’s annotation property so reasons, etc. ignore it.

Cheers,
David

On 29 Nov 2019, at 08:56, 'Bohms, H.M. (Michel)' via TopBraid Suite Users <topbrai...@googlegroups.com> wrote:

 
Could rdfs:isDefinedBy also have a single defined class/property as target for a subject?
 
Technically is seems ok (rdfs:resource range) but I see only uses where the target is a complete ontology...
 
Thx Michel
 
 
 
 
Dr. ir. H.M. (Michel) Böhms
Senior Data Scientist

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Bohms, H.M. (Michel)

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Dec 2, 2019, 2:59:57 AM12/2/19
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The devil is in the “may”

 

Technically it can be used broader but by convention/best-practise the “may” seems actually...”is typically only used for referencing to whole vocabs...”

 

 

 

 

 

Dr. ir. H.M. (Michel) Böhms
Senior Data Scientist

T +31888663107
M +31630381220
E michel...@tno.nl

Location

 

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