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Re: Some suggestions for http://www.w3.org/1999/02/22-rdf-syntax-ns#

From: Brian McBride <bwm@hplb.hpl.hp.com>
Date: Fri, 17 Oct 2003 12:23:05 +0100
Message-ID: <3F8FD119.1030702@hplb.hpl.hp.com>
To: wwmm <wwmm@seu.edu.cn>
Cc: www-rdf-comments@w3.org, public-webont-comments@w3.org

Thank you for these suggestions.

wwmm wrote:
> Hi,
> 
> There are some suggestions for http://www.w3.org/1999/02/22-rdf-syntax-ns# as follows.
> 
> 1. xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
>    xmlns:owl="http://www.w3.org/2002/07/owl#" 
>    xmlns:dc="http://purl.org/dc/elements/1.1/" 
> 
> maybe change to:
>    xmlns:rdf="http://www.w3.org/tr/rdf#"
>    xmlns:rdfs="http://www.w3.org/tr/rdf-schema#"
>    xmlns:owl="http://www.w3.org/tr/owl#"
>    xmlns:dc="http://purl.org/dc/elements/1.1/" 

The WG did consider changing the namespace names as it updated the
specifications but decided not to.  I beleive that considerations of the
undesirable effects on existing data and implemntations weighed more
heavily than any advantage gained.

> 
> So, these namespace will be stable relatively.

Err, no - we really don't want to do that.  it would be a bad thing if
the meaning of an existing document changed when we updated the spec.

 And add dc:date or owl:versionInfo into the ontology.

We are planning to update this document and will likely include
owl:versionInfo.

> 
> 2. The "Resource" had been defined by RDF Model and Sytax, not RDF Schema, So "Resource" should be rdf:Resource.
> and the following statment should be appended in http://www.w3.org/1999/02/22-rdf-syntax-ns#.
> 
> <rdfs:Class rdf:ID="Resource"
>   <rdfs:isDefinedBy rdf:Resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#"/>
>   <rdfs:label>Resource</rdfs:label>
>   <rdfs:comment>The class resource, everything.</rdfs:comment>
> </rdfs:Class>

I think this is covered by our decision not to change the namespaces.
Were we changing the namespaces, this would be a sensible change to
make, but since we are not, then this is not an appropriate time to make
such a change.

> 
> 3. The following statments should be appended in http://www.w3.org/1999/02/22-rdf-syntax-ns#.
> 
> <rdfs:Class rdf:ID="XMLLiteral"
>   rdf:type rdf:Resource="http://www.w3.org/TR/rdf-schema#Datatype"
>   rdfs:comment="The class of XML literal values." />
> 
> <rdfs:Class rdf:ID="List"
>   rdfs:comment="The class of RDF Lists." />
> 
> <rdfs:Class rdf:ID="nil"
>   rdfs:comment="The empty list." />
> 
> <Property ID="first"
>   rdfs:comment="The first item in the subject RDF list." />
> 
> <Property ID="rest"
>   rdfs:comment="The rest of the subject RDF list after the first item." />
> 
> Perhaps, rdf:about, rdf:ID, rdf:RDF, rdf:Desciption should also be defined in http://www.w3.org/1999/02/22-rdf-syntax-ns#.
> 

Yes.  We are planning to update this document and will include these new
terms.  WG discussion and a draft of the new version can be found at:

  http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2003Aug/0085.html

Please respond to this message, copying www-rdf-comments@w3.org
indicating whether this is an acceptable response.

Brian

> 
> Regards,
> 
> Lotus Wu
> 
> 
> ps.
> A new version http://www.w3.org/1999/02/22-rdf-syntax-ns# as follows:
> 
> <?xml version="1.0"?>
> <RDF
>   xmlns="http://www.w3.org/tr/rdf #"
>   xmlns:rdf="http://www.w3.org/tr/rdf#"
>   xmlns:rdfs="http://www.w3.org/tr/rdf-schema#">
> 
> <!--
>   This is the RDF Schema for the RDF data model as described in the
>   Resource Description Framework (RDF) Model and Syntax Specification
>   http://www.w3.org/TR/REC-rdf-syntax-->
> 
> 
> <!-- New statement about rdf:Resource-->
> <rdfs:Class rdf:ID="Resource"
>   <rdfs:isDefinedBy rdf:Resource="http://www.w3.org/TR/rdf#"/>
>   <rdfs:label>Resource</rdfs:label>
>   <rdfs:comment>The class resource, everything.</rdfs:comment>
> </rdfs:Class>
> 
> <rdfs:Class rdf:ID="Statement"
>   rdfs:comment="A triple consisting of a predicate, a subject, and an object." />
> 
> <rdfs:Class rdf:ID="Property"
>   rdfs:comment="A name of a property, defining specific meaning for the property" />
> 
> <rdfs:Class rdf:ID="Bag"
>   rdfs:comment="An unordered collection" />
> 
> <rdfs:Class rdf:ID="Seq"
>   rdfs:comment="An ordered collection" />
> 
> <rdfs:Class rdf:ID="Alt"
>   rdfs:comment="A collection of alternatives" />
> 
> 
> <!--Add rdf:XMLLiteral, rdf:List, rdf:nil, rdf:first, rdf:rest-->
> <rdfs:Class rdf:ID="XMLLiteral"
>   rdf:type rdf:Resource="http://www.w3.org/TR/rdf-schema#Datatype"
>   rdfs:comment=" The class of XML literal values." />
> 
> <rdfs:Class rdf:ID="List"
>   rdfs:comment=" The class of RDF Lists." />
> 
> <rdfs:Class rdf:ID="nil"
>   rdfs:comment=" The empty list." />
> 
> <Property ID="first"
>   rdfs:comment="The first item in the subject RDF list." />
> 
> <Property ID="rest"
>   rdfs:comment=" The rest of the subject RDF list after the first item." />
> 
> <Property ID="predicate"
>   rdfs:comment="Identifies the property used in a statement when representing the statement in reified form">
>   <rdfs:domain rdf:Resource="#Statement" />
>   <rdfs:range rdf:Resource="#Property" />
> </Property>
> 
> <Property ID="subject"
>   rdfs:comment="Identifies the resource that a statement is describing when representing the statement in reified form">
>   <rdfs:domain rdf:Resource="#Statement" />
> </Property>
> 
> <Property ID="object"
>   rdfs:comment="Identifies the object of a statement when representing the statement in reified form" />
> 
> <Property ID="type"
>   rdfs:comment="Identifies the Class of a resource" />
> 
> <Property ID="value"
>   rdfs:comment="Identifies the principal value (usually a string) of a property when the property value is a structured resource" />
> 
> </RDF>
Received on Friday, 17 October 2003 07:23:35 GMT

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