Last modified: 2012-04-16 09:15:41 UTC
MediaWiki should not strip HTML5 custom data attributes (data-xxx="..."). These are the standard method for passing data to clientside scripts in HTML5, and are fully backwards-compatible. This has many applications, such as table sorting and metadata handling. HTML5 spec section: http://dev.w3.org/html5/spec/Overview.html#embedding-custom-non-visible-data-with-the-data-attributes
Digging into the code, it seems this was already fixed in the unreleased version: r1=70911&r2=70980">http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/includes/Sanitizer.php?r1=70911&r2=70980
(Same URL, but not mangled by Bugzilla: http://tinyurl.com/23lleuo )
You can just say "r70980" and it will be auto-linked.