W3C home > Mailing lists > Public > public-xhtml2@w3.org > October 2007

Re: role cardinality [was: Re: ARIA Proposal ]

From: Richard Schwerdtfeger <schwer@us.ibm.com>
Date: Mon, 1 Oct 2007 14:36:37 -0500
To: "Anne van Kesteren" <annevk@opera.com>
Cc: "Al Gilman" <Alfred.S.Gilman@ieee.org>, public-html <public-html@w3.org>, public-html-request@w3.org, public-xhtml2@w3.org, "Simon Pieters" <simonp@opera.com>, "wai-xtech@w3.org" <wai-xtech@w3.org>
Message-ID: <OFFE9F7D80.E0836C28-ON86257367.006B81E9-86257367.006BB6DB@us.ibm.com>

Hi Anne,

Thanks. The tricky thing is that XHTML 1.x modularization also uses the
same http://www.w3.org/1999/xhtml namespace. So, when we introuce aria-
properties for xhtml serialization they also show up there. So, there is
serialization for html and then the xhtml modularization work . How is that


Rich Schwerdtfeger
Distinguished Engineer, SWG Accessibility Architect/Strategist
Chair, IBM Accessibility Architecture Review  Board
blog: http://www.ibm.com/developerworks/blogs/page/schwer

             "Anne van                                                     
             <annevk@opera.com                                          To 
             >                         Richard                             
             10/01/2007 01:55          "Simon Pieters" <simonp@opera.com>  
             PM                                                         cc 
                                       "Al Gilman"                         
                                       public-html <public-html@w3.org>,   
                                       Re: role cardinality [was: Re: ARIA 
                                       Proposal ]                          

On Mon, 01 Oct 2007 20:37:53 +0200, Richard Schwerdtfeger
<schwer@us.ibm.com> wrote:
> One thing that came up on today's pf call was the point about
> aria-properties being in the XHTML namspace. This is new. So, the
> question I have is which of the two working groups owns the xhtml
> namespace - xhtml2 or html? This was not clear after the W3C split the
> effort.
> The proposal states: UAs must process an aria-propertyname attribute in
> no namespace that is part of an element in the
> http://www.w3.org/1999/xhtml
> namespace as described below, unless that element has a propertyname
> attribute in the http://www.w3.org/2005/07/aaa namespace specified.

The HTML WG works on both HTML and an XML serialization of HTML. The XML
serialization of HTML is a "backwards compatible" version of XHTML 1.0 and

the HTML serialization is a "backwards compatible" version of HTML 4.01
simply said. HTML 4.01 and XHTML 1.0 share the same underlying language.
As do the HTML and XML serializations of HTML 5.

The WG tries to minimize the amount of differences between the HTML and
XML serialization of HTML 5. For instance, an HTML DOM will have elements
put in a namespace once HTML 5 is implemented. This also simplifies things

for authors when transitioning between the two and hopefully makes
implementing and testing a bit saner as well.

Anyway, the result of the above is that if a new feature for the HTML
serialization is introduced it is also introduced for the XML
serialization and hence aria-*="" attributes work for both HTML and HTML
serialized as XML (XHTML). (The aria-*="" attributes are _not_ in a
namespace by the way and the proposal did _not_ change regarding this.
This has been consistent from the start.)

Hope this helps.

Anne van Kesteren

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Received on Monday, 1 October 2007 19:37:06 UTC

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