xmlcatalog(1) on Linux
The text d77c2b54c2af, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
Command line tool to parse and manipulate XML or SGML catalog files.
Flags it lists
-
--add -
--create -
--del -
--no-super-update -
--noout -
--sgml -
--shell -
--verbose -
-v