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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
     http://www.w3.org/TR/xhtml-rdfa-primer/#id68454
     Tue, 16 May 2006 19:16:41 GMT

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

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

     *AND*
     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 7.4.4.3
     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  
(GRDDL)
     http://www.w3.org/TeamSubmission/2005/SUBM-grddl-20050516/#grddl- 
xhtml
     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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