/var/db/repos/gentoo/profiles/license groups

 contains groups  of  licenses  that  may  be  specified in the ACCEPT_LICENSE variable (see make.conf(5)). Refer to GLEP 23 for further information.

Format

 * Comments begin with  (no inline comments).
 * One group name, followed by list of licenses and nested groups.
 * Nested groups are prefixed with the  symbol.

Examples
The FSF-APPROVED group includes the entire GPL-COMPATIBLE group and more:

The GPL-COMPATIBLE group includes all licenses compatible with the GNU GPL: