dtdparse(1p) on Linux
The text cfd2757f8cc7, as Debian 11 (Bullseye) shipped it.
Generate an XML representation of an SGML or XML DTD.
Flags it lists
-
--catalog -
--debug -
--declaration -
--help -
--man -
--namecase-entity -
--namecase-general -
--nonamecase-entity -
--nonamecase-general -
--nounexpanded -
--noverbose -
--noxml -
--output -
--public-id -
--system-id -
--title -
--unexpanded -
--verbose -
--version -
--xml