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RE: New Intro to RDF

From: Hammond, Tony <T.Hammond@nature.com>
Date: Tue, 4 Oct 2005 09:50:04 +0100
Message-ID: <125F7834E11A5741A7D79412EE3504F91D08CA2F@UK1APPS2.mpl.root-domain.org>
To: 'Joshua Tauberer' <tauberer@for.net>, 'SWIG' <semantic-web@w3.org>

Hi Joshua:

Looks to be an excelent introduction to RDF. I will look forward to reading
it. One thing you may want to change, though, throughout is your use of
'urn:' URIs. The '/' character is specifically reserved in 'urn:' syntax -
see extract below from RFC 2141. That is, '/' in URI syntax is a hierarchy
delimiter and hierarchy is not expressed as such in 'urn:' URIs. Also the
construct 'urn://global/name/own' would make 'global' a network authority.
'urn:' does not express network authorities, but rather URN namespaces, e.g.

	urn:isbn:0671534645

Cheers,

Tony


###

2.3 Reserved characters

   The remaining character set left to be discussed above is the
   reserved character set, which contains various characters reserved
   from normal use.  The reserved character set follows, with a
   discussion on the specifics of why each character is reserved.

   The reserved character set is:

   <reserved>    ::= '%" | "/" | "?" | "#"

###

> -----Original Message-----
> From: semantic-web-request@w3.org 
> [mailto:semantic-web-request@w3.org] On Behalf Of Joshua Tauberer
> Sent: 03 October 2005 23:23
> To: 'SWIG'
> Subject: New Intro to RDF
> 
> 
> 
> Hi,
> 
> As probably everyone on the list knows, there's a lot of negative 
> opinions of RDF out there, and it seems like some of this 
> stems from a 
> confusion of RDF the XML format and RDF the general method for 
> expressing knowledge.  But, I haven't come across a deep 
> explanation of 
> what RDF-the-method is that we can point people to so they 
> know there's 
> more to RDF than the serialization format.
> 
> I know such a document may very well exist, but I figured I 
> would take a 
> stab at writing one myself.  (If it has no value for anyone else, at 
> least I gained a deeper understand of RDF by writing it :-).  What I 
> wrote is posted at:
> 
> http://taubz.for.net/code/semweb/whatisrdf/
> 
> The goal was to introduce RDF from the beginning, show why 
> it's useful 
> for modeling knowledge in a distributed way, and to give a basic 
> presentation of RDFS and OWL.
> 
> It's long for an introduction as I tried to be as explicit as 
> possible 
> about what defines RDF (at least in my understanding of RDF). 
>  A shorter 
> to-the-point version could be synthesized from this.
> 
> Comments welcome, especially if you think it was worth the 
> time writing.  :)
> 
> -- 
> - Joshua Tauberer
> 
> http://taubz.for.net
> 
> ** Nothing Unreal Exists **
> 
> 

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Received on Tuesday, 4 October 2005 08:50:43 UTC

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