The document provides an overview of open source licensing. It defines open source software as software with an open source license that gives users the rights to use, modify, and distribute the software as well as access its source code. Prominent open source programs and vendors are listed. The history and roles of the Open Source Initiative (OSI) and Open Source Definition (OSD) are described. Common open source licenses like the GPL, BSD, and Mozilla licenses are outlined and compared. The risks and benefits of open source software are briefly discussed.

1. Open Source Licensing
An Introduction

2. Open Source
Software

3. What is open source software?
 Open source software is software that is
subject to an open source license.
 An open source licensor must give the
licensee certain rights to be considered
open source
 Basically, the licensee has the right to
use, modify or distribute the software, and
the right to access the source code.

4. Is it the same as free software?
 Generally yes
 Free software was the original name
 Open source began being used to allay
the concerns of proprietary software
companies that were thinking of utilizing or
developing free software

5. Prominent Open Source
Programs
 Apache Web Server
 Mozilla and Firefox web browsers
 Linux
 BIND
 MySQL

6. Prominent Open Source Vendors
 IBM
 Red Hat
 Sun Microsystems

7. The History of Open Source
 Richard Stallman, the GNU operating System,
the Free Software Foundation, and the General
Public License (GPL)
 Bill Joy, UNIX and the Berkeley Software
Distribution License (BSD)
 Open source comes of age – Linux, Mozilla,
Apache et al., and the corporate licenses
 The Open Source Initiative

8. What are the OSI and the OSD?
 The Open Source Initiative (OSI) is the de facto
standards body for open source software. It
determines what open source means, and
approves licenses as being open source
 The Open Source Definition (OSD) is a set of
criteria that a license must conform to to be
considered open source. The OSI maintains the
definition and changes it from time to time.

9. The Open Source Definition
 1. Free Redistribution. “The license
shall not restrict any party from selling or
giving away the software as a component
of an aggregate software distribution
containing programs from several different
sources, The license shall not require
royalty or other fee for such sale.”

10.  2. Source Code. “The program must include source
code, and must allow distribution in source code as well
as compiled form. Where some form of a product is not
distributed with source code, there must be a well
publicized means of obtaining the source code for no
more than a reasonable reproduction cost, preferably,
downloading via the Internet without charge. The source
code must be the preferred form in which a programmer
would modify the program. Deliberately obfuscated
source code is not allowed. Intermediate forms such as
the output of a preprocessor or translator are not
allowed.”

11.  3. Derived Works. “The license must
allow modifications and derived works,
and must allow them to be distributed
under the same terms as the license of
the original software.”

12.  4. Integrity of the Author’s Source Code.
“The license may restrict source-code from
being distributed in modified form only if the
license allows the distribution of ‘patch files’ with
the source code for the purpose of modifying the
program at build time. The license must
explicitly permit distribution of software built from
modified source code. The license may require
derived works to carry a different name or
version number from the original software.”

13.  5. No Discrimination Against Persons or
Groups. “The license must not discriminate
against any person or group of persons.”
 6. No Discrimination Against Fields of
Endeavor. “The license must not restrict
anyone from making use of the program in a
specific field of endeavor. For example, it may
not restrict the program from being used in a
business, or from being used in genetic
research”

14.  7. Distribution of License. “The rights
attached to the program must apply to all
to whom the program is redistributed
without the need for execution of an
additional license by those parties.”

15.  8. License Must Not Be Specific to a Product.
“The rights attached to the program must not
depend on the program’s being part of a
particular software distribution. If the program is
extracted from that distribution and used or
distributed within the terms of the program’s
license, all parties to whom the program is
redistributed should have the same rights as
those that are granted in conjunction with the
original software distribution.”

16.  9. License Must Not Contaminate
Other Software. “The license must not
place restrictions on other software that is
distributed along with the licensed
software. For example, the license must
not insist that all other programs
distributed on the same medium must be
open-source software.”

17.  10. License Must Be Technology
Neutral. “No provision of the license may
be predicated on any individual
technology or style of interface.”

18. Open Source Licenses In
General

19. There are several types of
software licenses:
 The GPL, or “copyleft” family of licenses
 The BSD/academic family of licenses
 The Mozilla/corporate type licenses
 Other open source licenses
 Traditional proprietary licenses
 Shareware/freeware
 Public domain (not a license, but a way of
accessing software)

20. The GPL family of licenses
 Basic rights under the GPL – access to
source code, right to make derivative
works
 “Copyleft”
 The Library or Lesser General Public
License

21. The BSD family of licenses
 Same basic rights as GPL
 No copyleft provisions, i.e. licensees can
take software licensed under the BSD
private
 Can re-release software under a different
license

22. Mozilla/corporate licenses
 More expertly drafted
 Serve as a model for later commercial
licenses
 Different provisions on relicensing
 No copyleft

23. Other Open Source Licenses
 There are over fifty (50) other open source
licenses
 The IBM Common Public License, the MIT
X license, and the Artistic License are
examples
 The open source community discourages
writing one’s own license in order to
prevent license proliferation

24. Shareware/Freeware
 May be free or may not
 Licensor does not provide the right to
make derivative works or give access to
source code

25. Public Domain
 Author retains no copyright rights if software is in
the public domain
 Open source software authors retain copyright
rights
 Open source licenses contain restrictions, just
different ones than licensees may be used to
 The restrictions in open source licenses are
based on copyright law and depend on it for
their effectiveness.

26. Some Specific Open
Source Licenses

27. The GNU General Public License
(GPL)
 Part license, part manifesto
 Reciprocity/Copyleft
 Purpose is to increase amount of publicly
available software and ensure
compatibility
 Licensees have right to modify, use or
distribute software, and to access the
source code

28. Problems with the GPL
 Linking to GPL programs
 No explicit patent grant
 Does no discuss trademark rights
 Does not discuss duration
 Silent on sublicensing
 Relies exclusively on license law, not
contract

29. The Library or Lesser General
Public License (LGPL)
 Written to deal with the linking problem in
the GPL discussed above
 Provides that programs that merely link to
a program in a library are not subject to
copyleft
 If licensee makes a derivative work of the
library, copyleft applies

30. The Berkeley Software
Distribution License (BSD)
 No copyleft/reciprocity provision
 Does not mention patents

31. Other BSD type academic
licenses
 MIT
 Apache
 Artistic License

32. The Mozilla Public License (MPL)
 Professionally written
 Includes an explicit patent grant, including
a reciprocal grant for contributors
 Includes many specific provisions that are
absent in the GPL and BSD but which are
often in licenses.

33. The Common Public License
(CPL)
 Developed and owned by IBM
 Includes a limited patent license
 Contains a reciprocity provision
 Contains a patent defense provision
 Indemnity provision

34. The Open Source License and
the Academic Free License
 Mirror images of each other, except the
AFL does not include reciprocity
provisions and the OSL does
 Addresses aspects of copyright left out by
other licenses, such as scope and
duration
 Grants a patent license
 Retains name and trademark of licensor

35. Multiple Licensing and other
strategies
 Microsoft’s Shared Source License
 Public Source
 Multiple Licensing
 Licensing in phases

36. Risks and Benefits of
Open Source
Software

37. Legal Risks
 Intellectual property infringement
 No warranties
 Copyleft
 Copyright attribution and notice requirements
 Enforcement
 Ambiguous license terms
 Consumer protection laws
 License management
 Licenses have not been construed by an American Court
 Licenses may be revocable
 Uncertain interpretation
 Forking (not a legal risk, but still a risk)

38. Benefits
 Increased user base
 Longer useful life
 Increased stability
 Security
 Scalability
 Innovation
 Cost
 Adaptability

39. How do licensors make money
with open source software?
 Usually by providing other services, such as:
 Support
 Training
 Customization
 Integration
 Certification
 Offering warranties

40. The Open Source
Idea in Other
Contexts

41. Open Content
 “Describes any kind of creative work
published in a format that explicitly allows
copying and modifying of its information
by anyone, not exclusively by a closed
organization, firm, or individual.” From
Wikipedia, the world’s largest open source project.

42. Creative Commons
 Creative Commons Licenses
 Baseline rights
 Various Licenses
 Creative Commons International

43. Other Open Content
Organizations
 Creative Commons International
http://creativecommons,org/international/
 Science Commons (a Creative Commons Project)
http://sceincecommons.org
 Open Educational Resources Commons (OER)
http://www.oercommons.org/
 Open Content (http://www.opencontent.org/
 For more see the Google Directory,
http://www.google.com/Top/Computers/Open_Source/O
pen_Content/ (providing a list of websites dedicated to
open source)

44. Other open content licenses
include:
 GNU Free Documentation License
 Open Content License
 Free Art License
 Open Game License
 October Open Game License

45. Considerations before licensing with Creative
Commons or other open content license
 Make sure you understand what rights you
are retaining and which ones you are
giving up
 Make sure you own the copyright
 Make sure your work is subject to
copyright law
 “Be specific about what you are licensing”
(creative commons FAQs)

46. Further Reading

47.  LAWRENCE ROSEN , OPEN SOURCE LICENSING: SOFTWARE FREEDOM
AND INTELLECTUAL PROPERTY LAW (Prentice Hall Professional and
Technical Reference 2004), available at
http://www.rosenlaw.com/oslbook.htm. The best book on open source
licensing. Gives an in-depth but not overly detailed overview of issues
regarding open source licensing. Includes the text of some o the more
popular open source licenses and point-by-point analysis of some of the
most important licenses.
 http://www.opensource.org - the online home of the Open Source Initiative,
the de facto standards body of the open source movement. Provides a list
of and the text of all OSI approved licenses. Sets out the open source
principles, answers frequently asked questions, and provides helpful links
 Dennis M. Kennedy, A Primer on Open Source Licensing Legal Issues:
Copyright, Copyleft and Copyfuture, (2001), available at
http://www.denniskennedy.com/opensourcedmk.pdf.
 http://creativecommons.org - the open source idea in non software contexts

48. On the business issues:
 Eric S. Raymond, The Magic Cauldron, available
at http://www.catb.org/~esr/writings/magic-
cauldron/magic-cauldron.html/, (discussing how
to make money on open source)
 David A. Wheeler, “Why Open Source
Software/Free Software (OSS/FS, FLOSS, of
FOSS)? Look at the Numbers!,” available at
http://www.dwheeler.com/oss_fs_why.html#histo
ry (reviewing literature on and discussing the
benefits of open source versus proprietary
software)

49. Lists of open source projects
 http://freshmeat.net
 http://sourceforge.net

50. On open source software
generally
 Eric S. Raymond, The Cathedral and the
Bazaar: Musings on Linux and Open
Source by an Accidental Revolutionary
(O’Reilly Media 2001), available at
http://www.catb.org/~esr/writings/cathedral
-bazaar/

51. Conclusion

52. Like anything else, open source has
both risks and benefits (for licensors
and licensees)
They are neither an unmitigated good, nor
particularly dangerous. Before using them, either
to license your work or accepting work subject to
them, you should evaluate your own situation and
make an individual determination. General
information cannot take into account your
particular circumstances

53. And on a similar note,
remember . . .
This presentation is not legal advice. Legal advice can
only be provided with regards to specific factual
circumstances in the context of an attorney-client
relationship. This presentation does not establish an
attorney-client relationship. If you have any further
questions that you are unable to answer yourself after
reasonable efforts, contact the Department of Legal
Affairs, 304 Holladay Hall, 515-3071