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RE: My action item on Moby Dec, issue 14, etc

From: Bill de hÓra <dehora@eircom.net>
Date: Fri, 20 Sep 2002 15:35:49 +0100
To: "'Jonathan Borden'" <jonathan@openhealth.org>, "'David Orchard'" <dorchard@bea.com>, "'Tim Bray'" <tbray@textuality.com>, "'Norman Walsh'" <Norman.Walsh@Sun.COM>
Cc: <www-tag@w3.org>
Message-ID: <000a01c260b3$0493e910$887ba8c0@mitchum>



> Jonathan Borden
> This _entire_ controversy exists simply because the meaning 
> of the term
> "resource" is hopelessly overloaded, perhaps "URI" is as well.

No. A while back a few people on this list asserted that mappings from
URIs to resources are unambiguous. Indeed, this unambiguous mapping is
an axiom of the Web. Tim Bray says different and is prepared to take a
hard line on the matter. The RDF Model Theory says different too, see
below.

I don't see the disagreement having anything whatsoever to do with
definitions of resource and URIref, but having everything to do with how
these sets are related. You indicate as much: "Each URIref uniquely and
unambiguously labels the node.". That is where the disagreement lies.

> A URIref is a _label_ for a _node_. Each URIref uniquely and 
> unambiguously
> labels the node. Not all nodes are required to have labels. 
> Nodes may have
> properties and these properties may relate one node to another.

You could call that model a "Node Description Framework" or NDF for
short. 

As it happens, we have another model called the "Resource Description
Framework" or RDF for short. I know more about the RDF model than the
NDF one, but at first glance it seems there is at least one difference
between the two. In the RDF model, each URIref must be disambiguated.
Thus it is not an axiom of the RDF model that each URIref uniquely and
unambiguously labels a resource, we expect a process to do that work for
us. 

Bill de hÓra 
--
Propylon
www.propylon.com 

 
Received on Friday, 20 September 2002 10:37:13 GMT

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