dtddiff(1p) on Linux
The text b5b5573df065, as Debian 11 (Bullseye) shipped it.
Compare two SGML/XML DTDs
Flags it lists
-
--attributes -
--content-model-expanded -
--dump -
--elements -
--general-ents -
--help -
--man -
--noattributes -
--nocontent-model-expanded -
--noelements -
--nogeneral-ents -
--noparameter-ents -
--parameter-ents -
--version