On 20/08/2012 21:42, Joel C. Salomon wrote: > The intent of \tn seems to be providing a \cs-like macro that puts its > argument in a different index section for TeX/LaTeX2e commands (though > this is not implemented, or at least not working, at the moment). > > How relevant is this, outside the l3 project itself? Is there any > real reason for me to make this distinction in xpeek? > > —Joel The idea is exactly as you say. Long-term, we may want to enhance this difference. Thus I would recommend using \tn for LaTeX2e and TeX commands, and \cs for LaTeX3-related material. -- Joseph Wright