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isDefinedBy action item

From: Eric Miller <em@w3.org>
Date: 10 Jan 2003 09:37:51 -0500
To: w3c-rdfcore-wg@w3.org
Message-Id: <1042209471.8333.1966.camel@birch>

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

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:

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

Example 24: Simple Schema Example

<?xml version="1.0"?>

  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>

  <rdf:Property rdf:about="http://example.org/imagevocab#color">
    <rdfs:comment>A pantone color</rdfs:comment>
    <rdfs:isDefinedBy rdf:resource = "http://example.org/imagevocab" />


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 09:38:05 UTC

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