xmlroff(1) on Linux
The text 7657e7021e8a, as Debian 5.0 (Lenny) shipped it.
XSL formatter
Flags it lists
-
--compat -
--compat-stylesheet -
--continue -
--help -
--nocompat -
--novalid -
--valid -
-? -
-d -
-o -
-v -
-w