"...This is a guide to effective compliance with the GNU General Public License (GPL) and related licenses. In accordance with the Software Freedom Law Center’s (SFLC’s) philosophy of assisting the community with GPL compliance cooperatively, this guide focuses on avoiding compliance actions and minimizing the negative impact when enforcement actions occur. It introduces and explains basic legal concepts related to the GPL and its enforcement by copyright holders. It also outlines business practices and methods that lead to better GPL compliance. Finally, it recommends proper post-violation responses to the concerns of copyright holders..."