Binary package “sgml-base” in ubuntu xenial

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