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Re: rdf:about=""?

From: Phil Archer <phil.archer@icra.org>
Date: Mon, 21 Jun 2004 20:06:26 +0100
Message-ID: <013501c457c3$07e8e800$15276b51@PHILXP>
To: "DuCharme, Bob (LNG-CHO)" <bob.ducharme@lexisnexis.com>, "'Benja Fallenstein'" <b.fallenstein@gmx.de>
Cc: <www-rdf-interest@w3.org>

There's a W3C doc with relevance at
http://www.w3.org/MarkUp/2004/02/xhtml-rdf.html. This talks about linking an
XHTML instance with RDF. Being able to put about="" in the Link tag (or HTTP
Response Header) enables you to link multiple resources with a single
description since the originating XHTML instance can be interpreted as the
subject of the RDF graph. This is handy, for example, if you want to point
all the documents that you wrote at a single location where information
about you can be found.

Phil.

----- Original Message ----- 
From: "DuCharme, Bob (LNG-CHO)" <bob.ducharme@lexisnexis.com>
To: "'Benja Fallenstein'" <b.fallenstein@gmx.de>
Cc: <www-rdf-interest@w3.org>
Sent: Monday, June 21, 2004 7:43 PM
Subject: RE: rdf:about=""?


>
> Thanks. I tried many google searches first, on things like "rdf:about
'empty
> string'" without much luck.
>
> I see now from http://www.faqs.org/rfcs/rfc2396.html that "A URI reference
> that does not contain a URI is a reference to the current document."
>
> Bob
>
> -----Original Message-----
> From: www-rdf-interest-request@w3.org
> [mailto:www-rdf-interest-request@w3.org] On Behalf Of Benja Fallenstein
> Sent: Monday, June 21, 2004 2:22 PM
> To: DuCharme, Bob (LNG-CHO)
> Cc: 'www-rdf-interest@w3.org'
> Subject: Re: rdf:about=""?
>
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> The empty URI reference refers to the base URI. What the base URI is
depends
> on the document context (simplified algorithm: xml:base if available,
> otherwise network location of the document containing the reference).
>
> It's not in w3.org/tr, it's in the RFC that defines URIs, which I'm too
lazy
> to dig up, Google is your friend ;-)
>
> - - Benja
>
> DuCharme, Bob (LNG-CHO) wrote:
> | Adobe's specification for XMP [1] tells us that the rdf:about
> attribute may
> | be "an empty string ... which means that the XMP is physically local
> | to the resource being described." I've seen other uses of rdf:about=""
> | being used to indicate that the metadata shown describes the resource
> | that contains it. I suppose it's the most abbreviated relative URI
> | possible. Is it kosher? With or without xml:base being declared? Is
> | this possibility described at any document in  <http://www.w3.org/tr>
> | www.w3.org/tr? I
> looked
> | around and didn't see anything.
> |
> | (I am aware that XMP uses its own, uhhh, "profile" of RDF, so it may
> be part
> | of that.)
> |
> | thanks,
> |
> | Bob
> |
> | [1] http://partners.adobe.com/asn/tech/xmp/pdf/xmpspecification.pdf
> | <http://partners.adobe.com/asn/tech/xmp/pdf/xmpspecification.pdf> ,
> page 21
> |
> |
>
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Received on Monday, 21 June 2004 15:07:58 GMT

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