Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ Upstream-Name: PNG: The Definitive Guide Source: https://sourceforge.net/projects/png-mng/ Files: * Copyright: 1999 O'Reilly and Associates 2002-2006 Greg Roelofs License: GFDL-1.1+ Comment: from license.html. Files: debian/* Copyright: 2004-2008 Ross Burton 2016 Santiago Vila 2021 Joao Eriberto Mota Filho License: GFDL-1.1+ License: GFDL-1.1+ Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. . The complete text of the GNU Free Documentation License 1.1 can be found at https://www.gnu.org/licenses/old-licenses/fdl-1.1.html.