On Fri, Oct 25, 2013 at 9:59 PM, Joseph Wright <[log in to unmask]> wrote: > - You want to make 'weird' chars (catcode tricks with \lowercase > primitive) A thought: Conceptually speaking, upper-case and lower-case are concepts that have to do with letters, and making weird chars is a completely unrelated feature. The \lowercase trick is what I would call an implementation detail. With expl3 you have the opportunity to separate the two concepts in the public interface. Give the weird-char technique a different name... such as "bijective conversion". -- www.mhelvens.net