The Software Package Data Exchange® (SPDX®) Specification Version 2.3.1

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With thanks to Adam Cohn, Adolfo García Veytia, Aeva Black, Alan Tse, Alexios Zavras, Andrew Back, Andrew Lilley Brinker, Ann Thornton, Armin Tänzer, Arthit Suriyawongkul, Basil Peace, Bill Schineller, Bo Anderson, Bradlee Edmondson, Brandon Lum, Brian de Alwis, Bruno Cornec, Ciaran Farrell, Cody Smith, Daniel German, David Edelsohn, David Kemp, David Liu, David A. Wheeler, Debra McGlade, Dennis Clark, Dick Brooks, Douglas Winship, Ed Warnicke, Eran Strod, Eric Thomas, Esteban Rockett, Gary O'Neall, Glenn Stroz, Guillaume Rousseau, Hans Busch, Hassib Khanafer, Helio Chissini de Castro, Henk Birkholz, Hiroyuki Fukuchi, Ivana Atanasova, Jack Manbeck, Jaime Garcia, Jason Yundt, Jeff Licquia, Jeff Luszcz, Jeff Schutt, Jilayne Lovejoy, John Ellis, John Mudge, Jonas Oberg, Kamsang Salima, Karen Copenhaver, Kate Stewart, Keith Zantow, Kevin Mitchell, Kim Weins, Kirsten Newcomer, Kris Reeves, Liang Cao, Lon Hohberger, Łukasz Zemczak, Manabu Niseki, Marc-Etienne Vargenau, Mark Gisi, Mark Lodato, Marshall Clow, Martin Michlmayr, Martin von Willebrand, Mark Atwood, Matija Šuklje, Matt Germonprez, Maximilian Combüchen, Maximilian Huber, Michael J. Herzog, Michel Ruffin, Nisha Kumar, Norbert Manthey, Norio Kobota, Nuno Brito, Oliver Fendt, Paul Madick, Paul Millar, Peter Williams, Phil Robb, Philip Koltun, Philip Odence, Phillippe Ombredanne, Pierre Lapointe, Pierre Tardy, Rana Rahal, Rex Jaeschke, Robert Martin, Robin Gandhi, Robin Vobruba, Rose Judge, Sam Ellis, Sameer Ahmed, Scott K Peterson, Scott Lamons, Scott Sterling, Sean Barnum, Sebastian Crane, Shane Coughlan, Steve Cropper, Steve Winslow, Stuart Hughes, Thomas F. Incorvia, Thomas Schmidt, Thomas Steenbergen, Tom Callaway, Tom Vidal, Tomo Dote, Toru Taima, Venkata Krishna, W. Trevor King, William Bartholomew, Yev Bronshteyn, Yoshiko Ouchi, Yoshiyuki Ito, Yuji Nomura, Zachary McFarland and Zalan Blenessy for their contributions and assistance.