Install sgml-base by entering the following commands in the terminal:
sudo apt update sudo apt install sgml-base
Description:
SGML infrastructure and SGML catalog file support
This package creates the SGML infrastructure directories and provides SGML catalog file support in compliance with the current Debian SGML Policy draft: . * infrastructure directories: - /etc/sgml - /usr/share/sgml/{declaration,dtd,entities,misc,stylesheet} - /usr/share/local/sgml/{declaration,dtd,entities,misc,stylesheet} . * update-catalog(8): tool for maintaining the root SGML catalog file and the package SGML catalog files in the '/etc/sgml' directory.
Version: 1.29
Section: text