On Sat, Jul 9, 2011 at 3:49 AM, Niklas Laxström niklas.laxstrom@gmail.com wrote:
It exists and it's called data-sort-value attribute. And it's already live on Wikipedia as far as I can see.
data-* attributes are only valid in HTML5 and will not work until $wgHtml5 is set to true. As has been discussed here a number of times, it's been true on trunk continuously since r53142 (June 12, 2009) and in releases since 1.16, but it hasn't yet been enabled on Wikimedia sites. Apparently there are finally plans to try enabling it for Wikimedia in the near future.