* Bruno Le Floch <[log in to unmask]> [2012-02-06 04:26:24 -0500]: Hi Brunon, : Update your l3experimental bundle. This is a very recent feature. It : appears to be documented (and hopefully working) in the version on : CTAN (and it got partially reimplemented since then on the svn I : think). Thanks. I should have mentioned my installation version. I already have a recent installation. The version I have is from 2012/01/31 (I did a tlmgr update --all). I'll get back to you about the rest after I've had a change to study it. Thanks again for your help. Regards, Marc