Am Fri, 10 Apr 2015 11:13:18 +0200 schrieb Ulrike Fischer: > Is there a way to assign the default key to "none and all groups" > so that is always processed by both commands? As expected, once I post a question I find a solution: \documentclass{article} \usepackage{expl3} \begin{document} \ExplSyntaxOn \keys_define:nn {mymodule} { initkey .code:n = {init!~}, initkey .groups:n = {init}, laterkey .code:n = {later!~}, laterkey .groups:n = {later}, default .meta:n = {initkey,laterkey}, default .groups:n = {meta}, } \keys_set_groups:nnn {mymodule} {meta,init} {default} \par %init \keys_set_filter:nnn {mymodule} {init} {default} \par %later \ExplSyntaxOff \end{document} -- Ulrike Fischer http://www.troubleshooting-tex.de/