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Re: isDefinedBy action item

From: Dan Brickley <danbri@w3.org>
Date: Fri, 10 Jan 2003 09:43:12 -0500
To: Eric Miller <em@w3.org>
Cc: w3c-rdfcore-wg@w3.org
Message-ID: <20030110144312.GA21596@tux.w3.org>

Eric,

Thanks for this. A brief nitpic:
in your example,  you might consider adding '#' to the end of the URI(ref), 
so that it matches the uriref that'd be used to deploy the vocab as a 
namespace.

other than that, seems fine. I was in a minority with isDefinedBy in that 
I wanted it to have at most one value for any given resource/property, and 
without that I find it of less use / interest. Your account below seems 
self-consistent though.

Dan


* Eric Miller <em@w3.org> [2003-01-10 09:37-0500]
> 
> Danbri, Frank,
> 
> summary: I would assert that these 2 documents are in sync with the
> (intentionally sparse) definition of isDefinedBy. I suggest a
> non-critical editorial change to the primer in the addition of an
> example included at the end of this message.
> 
> > ACTION: 2002-05-03#4 em
> > liase with danbri to ensure primer and schema stay in sync over the isDefinedBy issue
> 
> [[
> 5.4.2 rdfs:isDefinedBy
> 
> rdfs:isDefinedBy is an instance of rdf:Property that is used to indicate
> a resource defining the subject resource. This property may be used to
> indicate an RDF vocabulary in which a resource is described.
> 
> A triple of the form:
> 
> S rdfs:isDefinedBy O
> 
> states that the resource O defines S. It may be possible to retrieve
> representations of O from the Web, but this is not required. When such
> representations may be retrieved, no constraints are placed on the
> format of those representations. rdfs:isDefinedBy is a subproperty of
> rdfs:seeAlso.
> ]]
> http://www.w3.org/2001/sw/RDFCore/TR/WD-rdf-schema-20030117/#ch_isdefinedby
> 
> 
> 
> [[
> 5.4. Other Schema Information
> 
> RDF Schema also provides a number of other properties, which can be used
> to provide documentation and other information about an RDF schema or
> about instances. For example the rdfs:comment property can be used to
> provide a human-readable description of a resource. The rdfs:label
> property can be used to provide a more human-readable version of a
> resource's name. The rdfs:seeAlso property can be used to indicate a
> resource that might provide additional information about the subject
> resource. The rdfs:isDefinedBy property is a subproperty of
> rdfs:seeAlso, and can be used to indicate a resource that (in a sense
> not specified by RDF; e.g., the resource may not be an RDF schema)
> "defines" the subject resource. For further discussion of these
> properties, you should consult RDF Vocabulary Description Language 1.0:
> RDF Schema [RDF-VOCABULARY].
> ]]
> http://www.w3.org/2001/sw/RDFCore/TR/WD-rdf-primer-20030117/#otherschema
> 
> I would assert that these 2 documents are in sync with the
> (intentionally sparse) definition of isDefinedBy.
> 
> Editorial suggestion (not critical): 
> 
> I suggest we include an example illustrating a potential use of this
> property in the primer. Frank, if think this is a good idea and are
> willing to release write-lock, i can add this and renumber the examples
> accordingly.
> 
> Example 24: Simple Schema Example
> 
> <?xml version="1.0"?>
> 
> <rdf:RDF   
>   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"  
>   xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
>   xmlns:dc="http://purl.org/dc/elemenets/1.1/"
>   xmlns:my ="http://example.org/vocab#">
> 
>   <my:Vocabulary rdf:about="http://example.org/imagevocab">
>     <dc:title>Sample image vocabulary</dc:title>
>     <dc:description>This vocabulary is a sample vocabulary which defines
> a set of properties useful for describing images</dc:description>
>     <dc:date>2003-01-01</dc:date>
>     <dc:language>en</dc:language>
>   </my:Vocabulary>
> 
>   <rdf:Property rdf:about="http://example.org/imagevocab#color">
>     <rdfs:label>Color</rdfs:label>
>     <rdfs:comment>A pantone color</rdfs:comment>
>     <rdfs:isDefinedBy rdf:resource = "http://example.org/imagevocab" />
>   </rdf:Property>
> 
> </rdf:RDF>
> 
> 
> -- 
> eric miller                              http://www.w3.org/people/em/
> semantic web activity lead               http://www.w3.org/2001/sw/
> w3c world wide web consortium            http://www.w3.org/
> 
Received on Friday, 10 January 2003 09:43:33 EST

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