W3C home > Mailing lists > Public > www-html@w3.org > June 2005

RE: DC in XHTML2

From: Mark Birbeck <mark.birbeck@x-port.net>
Date: Tue, 7 Jun 2005 23:16:05 +0100
Message-ID: <A09C652B-FA32-4FD5-AB4C-FC28BE541912@S009>
To: "'Misha Wolf'" <Misha.Wolf@reuters.com>
Cc: <www-rdf-interest@w3.org>, <semantic-web@w3.org>, <www-html@w3.org>, <iptc-metadata@yahoogroups.com>, <dc-general@jiscmail.ac.uk>
Hi Misha,

One way to achieve a more abbreviated mark-up, even if it is not the full
solution of 'QNames in @href', is to use @xml:base. All @href values will be
relative to this, and an RDF/A processor should honour changes of base URI
through the mark-up. It will at least make your mark-up more compact.

That's not to say that we shouldn't try to find other solutions, too. In one
of my early drafts of RDF/A I did actually have an additional attribute
called @resource, which was a QName, and which sat alongside @href. See
section 4.2 of RDF/XHTML, as it was then called:

  <http://www.formsplayer.com/notes/xhtml-meta-data-03.html>

There was some resistance to it, since some people rightly say that QNames
are not URIs. But anyway, I'll take another look at it, since I certainly
think that yours is a strong use case for something less that a full URI.

Regards,

Mark

PS Good to see you all at your AGM today, and even better to see that your
requirements are being fed into the XHTML2 and RDF/A work!


Mark Birbeck
CEO
x-port.net Ltd.

e: Mark.Birbeck@x-port.net
t: +44 (0) 20 7689 9232
w: http://www.formsPlayer.com/
b: http://internet-apps.blogspot.com/

Download our XForms processor from
http://www.formsPlayer.com/ 

> -----Original Message-----
> From: www-html-request@w3.org 
> [mailto:www-html-request@w3.org] On Behalf Of Misha Wolf
> Sent: 07 June 2005 18:04
> To: dc-general@jiscmail.ac.uk
> Cc: www-rdf-interest@w3.org; semantic-web@w3.org; 
> www-html@w3.org; iptc-metadata@yahoogroups.com
> Subject: DC in XHTML2
> 
> 
> As some of you will know, the XHTML2 draft [1] introduces a 
> very interesting syntax for RDF, which many would consider to 
> be an improvement on the traditional RDF/XML syntax.  No 
> doubt, many content authors will be seeking to add DC 
> metadata to their XHTML2 content using these new mechanisms.
> 
> The News Architecture Working Party of the International 
> Press Telecommunications Council (IPTC) is investigating the use of
> XHTML2 for expressing DC and other metadata.  A major problem 
> for us is the lack of support in the current XHTML2 draft (as 
> in RDF/XML) for the use of QNames to express terms in 
> controlled vocabularies (aka values of properties).
> 
> At the moment, the XHTML2 @content attribute takes PCDATA and 
> the @href attribute takes IRIs.  There is no attribute 
> available for QNames.
> 
> We want to be able to use, eg, <dc:subject> with a QName as a 
> value (ie the object of the RDF statement).  The reasons 
> include legibility and compactness.  News items (and news 
> headlines) often carry numerous subject codes, hence the need 
> for compactness.
> 
> Is anyone else in the DC community looking at the use of DC in
> XHTML2 and thinking along similar lines to us?  We would be 
> very happy to work with others on this issue.
> 
> [1] http://www.w3.org/TR/xhtml2
> 
> Misha Wolf
> Standards Manager, Reuters
> Chair, News Metadata Framework WG, IPTC
> Vice-Chair, News Architecture WP, IPTC
> 
> 
> 
> 
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Received on Tuesday, 7 June 2005 22:17:14 UTC

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