On Sat, Jul 9, 2011 at 3:49 AM, Niklas Laxström
<niklas.laxstrom(a)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.