data-* attributes

Hi www-math,

I've recently noticed that the W3C validator <http://validator.w3.org/check>
considers  HTML5 documents with data-* attributes on MathML elements
invalid.

I'm wondering if this is a bug.

It also made me wonder in how far the MathML spec could adopt data-* in
general. The spec suggests
<http://www.w3.org/Math/draft-spec/mathml.html#chapter2_interf.unspecified>
namespacing
for unspecified data. When working in both XML and HTML5 contexts this
seems less than ideal.

Best regards,
Peter.
-- 

Dr. Peter Krautzberger
MathJax Manager
mathjax.org <http://www.mathjax.org/> | fb.com/mathjax | @mathjax
<http://twitter.com/mathjax>

*L <http://www.linkedin.com/pub/peter-krautzberger/45/4a4/6a5>inkedIn*
@pkrautz <http://twitter.com/pkrautz>