- From: Brian McBride <bwm@hplb.hpl.hp.com>
- Date: 2002年11月27日 08:09:35 +0000
- To: "Richard H. McCullough" <rhm@cdepot.net>, <www-rdf-comments@w3.org>
- Message-Id: <5.1.0.14.0.20021127075543.033203a8@0-mail-1.hpl.hp.com>
Hi Richard, At 12:33 26/11/2002 -0800, Richard H. McCullough wrote: >There are a number of domain & range errors in your descriptions of the >RDFS properties. You should check your descriptions against your table >"RDF Properties". Thanks for drawing our attention to this. Please not however that references to specific errors are much more helpful. Consider the difference between: Your spec is full of mistakes. You should check it over. and The range for property foobar is missing on page 5. The latter is more helpful to us. > >Since you provide no definitions, there is confusion about the distinction >between "resource" and "instance" and "member". For example, in the >description of "rdfs:type", does the domain of type include individuals, >or classes, or both? Right. We have some text in progress to clarify that. The answer to your question is that domain of type is rdfs:Resource. RDF Schema does not define the term individual. Please note also that a class is an instance (member) of rdfs:Resource. > >In your description of the property "rdfs:object", you imply that Literal >is not a subclass of Resource. That contradicts the definition of Resource. Right. That is a hangover from when we were being coy about whether Literals were resources or not. Will fix. Thanks. > >In many places, you say that x "represents" y. You should say "denotes" >or "means". We are in process of reviewing use of the term "represents". Sometimes we might replace it with denotes, others some variant of the verb to be. >The ranges in the "RDF Properties" table encourage the continuing >confusion between "Class" and "Resource". > With the exception of "type", the ranges should be "Resource" instead of > "Class". What properties do you mean. For example the range of rdfs:domain is definitely rdfs:Class. >The only consistent definition of "Class" that I can come up with is: >"Class" is the set of class names. I have shown you a description of class in discussion on rdf interest that was different to that. To the best of my knowledge, you have found no inconsistencies in it. > Given that definition, the range of "type" is "Class" Given the one we are using also, the range of type is rdfs:Class. >, i.e., a class name. No, its not the name of a class. Classes are named by URIrefs. The range of type is not uriref. Brian
Received on Wednesday, 27 November 2002 03:08:19 UTC