Re: Question about RDF in XHTML 1.0

This archive was generated by hypermail 2.2.0+W3C-0.50 : Tuesday, 8 January 2008 14:15:00 GMT

Luca,

We've focused purely on XHTML2 at this point, in particular since no  
complete solution seems possible within the current XHTML1 (apart  
from GRDDL [1], which we recommend you take a look at, too).

That said, we *are* discussing the use of the CLASS and ROLE  
attributes in RDF/A [2]. The resulting triples would not be what you  
cite below however, since, in following the HTML guidelines, CLASS  
would likely define something like rdf:type, instead of a property of  
the current page.

We hope that, once we've got the XHTML2 issues resolved, we will be  
able to think about how to use RDF/A in XHTML 1.1. The issues there  
aren't trivial, in particular with respect to validation.

Hope this helps, and please feel free to send us more comments and  
thoughts,

-Ben

[1] http://www.w3.org/2004/01/rdxh/spec
[2] http://www.w3.org/2001/sw/BestPractices/HTML/2005-current- 
issues#class

On Feb 20, 2006, at 11:13 AM, Luca Mascaro wrote:

> Hi all,
> just a question: have you considered the possibility to use class
> attribute for embedding RDF in XHTML 1.0 or 1.1?
>
> For example:
>
> <html xmlns:dc="http://purl.org/dc/elements/1.1/">
>   <head>
>     <title>Document</title>
>   </head>
>   <body>
>     <p><cite class="dc:author">Luca Mascaro</cite> is a user interface
> developer.</p>
> ..</body>
> </html>
>
> The CSS 3.0 specification introduce the namespace in CSS and I think
> that the definition of class attribute in the HTML 4.01 specification
> allow this use:
>
> The class attribute, on the other hand, assigns one or more class
> names to an element; the element may be said to belong to these
> classes. A class name may be shared by several element instances. The
> class attribute has several roles in HTML:
>
> * As a style sheet selector (when an author wishes to assign style
> information to a set of elements).
> * For general purpose processing by user agents.
>
> Regards
>
> --
> Luca Mascaro
> CTO Phiware Engineering Sagl