Copyleft

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Presentation to Counter 2010 conference

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Copyleft

  1. 1. Copyleft Andrés Guadamuz SCRIPT Centre for Research in IP and Technology Law University of Edinburgh
  2. 2. [Insert apology here]
  3. 3. A word of caution...
  4. 4. A word of caution...
  5. 5. A word of caution...
  6. 6. A word of caution...
  7. 7. A word of caution...
  8. 8. A word of caution...
  9. 9. A word of caution...
  10. 10. Realities
  11. 11. Copyleft basics
  12. 12. Copyleft licences Licence grant: gives users permission to use, copy, republish, redistribute, make the work available to the public, etc. Copyleft clause: Most important element in the licence. Allows modifications to the work as long as the modifications are released with the same licence. AKA: Viral clause (controversial), or Share-alike clause.
  13. 13. Copyleft clause “2(b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License.” GPL v2.
  14. 14. Licence ecology Copyleft Non-copyleft Hybrid •GPL •Free •BSD •Creative Documentation •Apache Commons Licence •Mozilla •LGPL •EUPL
  15. 15. Copyleft popularity Copyleft Other Non-Copyleft Public Domain Hancock T, Free Software Magazine, 9/3 2008
  16. 16. Creative Commons Copyleft Non-copyleft Publc Domain
  17. 17. Legal issues
  18. 18. Litigation Jacobsen v Katzer 535 F. 3d 137 (Artistic License, non- copyleft. GPLviolations.org: Sitecom (Landgericht Muenchen No. 21 0 6123/04) Fortinet (Landgericht Muenchen No. 21 0 7240/05). Caldera Sys., Inc. v. Int'l Bus. Machs. Corp (D. Utah 2003) (No. 03-CV-0294).
  19. 19. Distribution chains Author / Owner Licensee / Licensee / Licensee / Derivative User Distributor Derivative User User Distributor User Derivative
  20. 20. Trouble with popular works? Author
  21. 21. Licence complexity More than 150 OSS-certified licences. 6 types of Creative Commons licences, 2 copyleft. Compatibility: distribution of works released under two or three different licences. Must create map of compatible licences.
  22. 22. Semantic web
  23. 23. Concluding...
  24. 24. a.guadamuz@ed.ac.uk CC-BY-SA

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