Copyright for sgml-base source package in Yangtze V1.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: sgml-base
Source: 
#
# Please double check copyright with the licensecheck(1) command.

Files:     MAKE/include
           Makefile
           README
           examples/postinst
           examples/postrm
           examples/prerm
           tools/Makefile
           tools/catalog.centralized
           tools/catalog.super
           tools/transitional.cat
Copyright: __NO_COPYRIGHT_NOR_LICENSE__
License:   __NO_COPYRIGHT_NOR_LICENSE__

Files:     tools/install-sgmlcatalog
           tools/install-sgmlcatalog.8
           tools/update-catalog
           tools/update-catalog.8
Copyright: 1997 Christian Schwarz
           2001-2004 Ardo van Rangelrooij
           2012 Helmut Grohne
           2012 Jakub Wilk
License:   __UNKNOWN__
 This is free software; see the GNU General Public Licence version 2
 or later for copying conditions.  There is NO warranty.

#----------------------------------------------------------------------------
# Files marked as NO_LICENSE_TEXT_FOUND may be covered by the following
# license/copyright files.