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Re: Is RDFa ready to use with GRDDL?

From: Karl Dubost <karl@w3.org>
Date: Thu, 31 Aug 2006 09:06:00 +0900
Message-Id: <EA7DF781-7279-40F0-9193-F7E391345887@w3.org>
Cc: semantic-web@w3.org
To: Yoshio Fukushige <fukushige.yoshio@jp.panasonic.com>

Hi Yoshio,

Le 30 août 06 à 17:00, Yoshio Fukushige a écrit :
> I'm interested in RDFa and would like to try some my own examples.
> But is RDFa ready to use with GRDDL?

yes and no. A subset of RDFa is usable with GRDDL.

The full power of [RDFa][1] is only possible *for now* in XHTML 2.0.

     For example, Litteral properties
     <h1>Photo Album #12345: <span property="dc:title">Vacation in  
the South of France</span></h1>
     <h2>created by <span property="dc:creator">Mark Birbeck</span></h2>
     ]]] -- RDFa Primer 1.0
     Tue, 16 May 2006 19:16:41 GMT

     The attribute property is only available in XHTML 2.0, not XHTML  
1.* family.

     The profile attribute is not part anymore of the [XHTML 2.0 list  
of attributes][2].

     GRDDL requests to have a profile attribute in the head.

     A reference to http://www.w3.org/2003/g/data-view
     from the profile attribute (c.f. section
     Meta data profiles of [HTML4]) of an XHTML document[XHTML]
     indicates that links of type transformation relate
     the document to transformations that preserve
     its meaning.]]]
     -- Gleaning Resource Descriptions from Dialects of Languages  
     Mon, 16 May 2005 20:37:53 GMT

Summary: (As it is defined now)

GRDDL can be used now and only with        XHTML 1.0, XHTML 1.1
And only a subset of RDFa can be used with XHTML 1.0, XHTML 1.1
And GRDDL is NOT usable on                 XHTML 2.0

The issue has been raised in HTML WG
     It is not possible to define anymore new value
     for "class" in a defined way, because the profile
     attribute has been removed in the benefit of meta.
     ]]] - [property value limited to one value][3]

[1]: http://www.w3.org/TR/xhtml-rdfa-primer/
[2]: http://www.w3.org/TR/2006/WD-xhtml2-20060726/attributes.html
[3]: http://lists.w3.org/Archives/Public/www-html-editor/2006JulSep/0085

Karl Dubost - http://www.w3.org/People/karl/
W3C Conformance Manager, QA Activity Lead
   QA Weblog - http://www.w3.org/QA/
      *** Be Strict To Be Cool ***
Received on Thursday, 31 August 2006 00:06:11 UTC

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