Valid SPDX license03.04.18

example of valid GNU license:

Full name	Identifier	Deprecated as of:
GNU Affero General Public License v3.0 	AGPL-3.0 	3.0
eCos license version 2.0 	eCos-2.0 	2.0rc2
GNU Free Documentation License v1.1 	GFDL-1.1 	3.0
GNU Free Documentation License v1.2 	GFDL-1.2 	3.0
GNU Free Documentation License v1.3 	GFDL-1.3 	3.0
GNU General Public License v1.0 or later 	GPL-1.0+ 	2.0rc2
GNU General Public License v1.0 only 	GPL-1.0 	3.0
GNU General Public License v2.0 or later 	GPL-2.0+ 	2.0rc2
GNU General Public License v2.0 w/Autoconf exception 	GPL-2.0-with-autoconf-exception 	2.0rc2
GNU General Public License v2.0 w/Bison exception 	GPL-2.0-with-bison-exception 	2.0rc2
GNU General Public License v2.0 w/Classpath exception 	GPL-2.0-with-classpath-exception 	2.0rc2
GNU General Public License v2.0 w/Font exception 	GPL-2.0-with-font-exception 	2.0rc2
GNU General Public License v2.0 w/GCC Runtime Library exception 	GPL-2.0-with-GCC-exception 	2.0rc2
GNU General Public License v2.0 only 	GPL-2.0 	3.0
GNU General Public License v3.0 or later 	GPL-3.0+ 	2.0rc2
GNU General Public License v3.0 w/Autoconf exception 	GPL-3.0-with-autoconf-exception 	2.0rc2
GNU General Public License v3.0 w/GCC Runtime Library exception 	GPL-3.0-with-GCC-exception 	2.0rc2
GNU General Public License v3.0 only 	GPL-3.0 	3.0
GNU Library General Public License v2 or later 	LGPL-2.0+ 	2.0rc2
GNU Library General Public License v2 only 	LGPL-2.0 	3.0
GNU Library General Public License v2 or later 	LGPL-2.1+ 	2.0rc2
GNU Lesser General Public License v2.1 only 	LGPL-2.1 	3.0
GNU Lesser General Public License v3.0 or later 	LGPL-3.0+ 	2.0rc2
GNU Lesser General Public License v3.0 only 	LGPL-3.0 	3.0

https://spdx.org/licenses/

Anonymous

Valid SPDX license03.04.18

Information Epoch 1783165856