sgml2xml(1) on Linux
The text c6b90b993c96, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 3.0 (Woody) shipped it.
convert SGML to XML An SGML System Conforming to International Standard ISO 8879 — Standard Generalized Markup Language
Flags it lists
-
-C -
-D -
-b -
-c -
-e -
-f -
-i -
-v -
-w -
-x