Unsupported wai-aria roles

We're building a site in which we want to use wai-aria and we want to validate using the html5 doctype.

Unfortunately, both validator.w3.org and html5.validator.nu give errors on four wai-aria roles:

columnheader
heading
rowheader
tablist

For my test I took the roles from the DTD [1], which is from 2002. These roles are also in the current Candidate Recommendation.

Can somebody explain why these four roles are not supported by the validator? And does anybody have an idea when the full list will be supported? Or is something wrong with my test?

I searched various places, including this list, but couldn't find an answer.

This is my test document:

<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<div role="grid">
<div role="row">
<div role="columnheader"></div>
<div role="rowheader"></div>
</div>
</div>
<div role="heading"></div>
<div role="tablist"></div>
</body>
</html>

Thanks,
Edwin Martin

[1] http://svn.codetalks.org/repos/trunk/tools/ARIA-DTDs/xhtml1-strict-ARIA1.dtd


-----------------------------------------------------------------
ATTENTION:
The information in this electronic mail message is private and
confidential, and only intended for the addressee. Should you
receive this message by mistake, you are hereby notified that
any disclosure, reproduction, distribution or use of this
message is strictly prohibited. Please inform the sender by
reply transmission and delete the message without copying or
opening it.

Messages and attachments are scanned for all viruses known.
If this message contains password-protected attachments, the
files have NOT been scanned for viruses by the ING mail domain.
Always scan attachments before opening them.
-----------------------------------------------------------------

Received on Wednesday, 23 February 2011 16:08:05 UTC