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Re: Subclass of Thing/Resource

From: Guha <guha@epinions-inc.com>
Date: Fri, 03 Mar 2000 14:33:49 -0800
Message-ID: <38C03DCC.B02AB686@mail.epinions.com>
To: Tim Berners-Lee <timbl@w3.org>
CC: Guha <guha@epinions-inc.com>, www-rdf-interest <www-rdf-interest@w3.org>
Tim,

 I think many of these questions center around
precisely defining what an RDF Resource Identifier
is supposed to be.

   I agree that we need to distinguish between RDF
Resource identifiers and URIs. A URI is a pretty formal object
(protocol + host + opaque string) whose definition pretty
concretely  constrains what can have a URI. By
this definition, people, places, etc. cannot have URIs.

 On the other hand, it would be very convenient to have
a unique canonical identifier for refering to the one TimBL
or one RalphSwick. In my reading, this is what the RDF
Resource ID is. Everything (including literals, URIs, ...) could
potentially have one of these.

  I do think it would be nice if an application can assume
some kind of structure to these identifiers, but not being
able to do so would not be fatal.

 I agree with you that http://foo.org/bar.rdf#xyz is a lousy
identifier for an object. To me, it just represents a position
is a file.

 In the long run, the object identifier namespace will have
to be like the DNS namespace.

 Reactions?

 guha
Received on Friday, 3 March 2000 17:37:12 GMT

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