Richard Walker wrote > \hierarchical/path/to/module/perhaps_with_underscores/macro_name:argspec It looks nice. > >(or according to Hans - I need more convincing): > > \hierarchical/path/to/module/perhaps_with_underscores/macro_name:argspec: The finishing char can be add on the fly. Instead of (after Hans Aberg) \def\getargspec#1{\expandafter\@getargspec\string#1} \catcode`\:=12 \def\@getargspec#1#2:#3{Command ``#2'' has argspec #3!} which only gets the very first spec: \def\getargspec#1{\expandafter\@getargspec\string#1\\} %^^ \catcode`\:=12 \def\@getargspec#1#2:#3\\{Command ``#2'' has argspec #3!} %^^ Regards Javier