dtdflatten(1p) on Linux
The text 5beee9a60d4b, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
Flatten an SGML/XML DTD.
Flags it lists
-
--catalog -
--debug -
--declaration -
--help -
--man -
--noverbose -
--output -
--preserve -
--verbose -
--version