Thank you Thorsten!

Functions can have two attributes, ``trace'' and ``export'', which can be
set with typeset -ft and typeset -fx, respectively. When a traced func-
tion is executed, the shell's xtrace option is turned on for the func-
tion's duration; otherwise, the xtrace option is turned off. The
``export'' attribute of functions is currently not used. In the original
Korn shell, exported functions are visible to shell scripts that are exe-
cuted.



# Han