BSD Protection License

February 2002

Preamble

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The Berkeley Software Distribution ("BSD") license has proven very effective
over the years at allowing for a wide spread of work throughout both
commercial and non-commercial products. For programmers whose primary
intention is to improve the general quality of available software, it is
arguable that there is no better license than the BSD license, as it permits
improvements to be used wherever they will help, without idealogical or
metallic constraint.

This is of particular value to those who produce reference implementations of
proposed standards: The case of TCP/IP clearly illustrates that freely and
universally available implementations leads the rapid acceptance of standards
-- often even being used instead of a de jure standard (eg, OSI network
models).

With the rapid proliferation of software licensed under the GNU General Public
License, however, the continued success of this role is called into question.
Given that the inclusion of a few lines of "GPL-tainted" work into a larger
body of work will result in restricted distribution -- and given that further
work will likely build upon the "tainted" portions, making them difficult to
remove at a future date -- there are inevitable circumstances where authors
would, in order to protect their goal of providing for the widespread usage of
their work, wish to guard against such "GPL-taint".

In addition, one can imagine that companies which operate by producing and
selling (possibly closed-source) code would wish to protect themselves against
the rise of a GPL-licensed competitor. While under existing licenses this
would mean not releasing their code under any form of open license, if a
license existed under which they could incorporate any improvements back into
their own (commercial) products then they might be far more willing to provide
for non-closed distribution.

For the above reasons, we put forth this "BSD Protection License": A license
designed to retain the freedom granted by the BSD license to use licensed
works in a wide variety of settings, both non-commercial and commercial, while
protecting the work from having future contributors restrict that freedom.

The precise terms and conditions for copying, distribution, and modification
follow.

BSD PROTECTION LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION, AND
MODIFICATION

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0. Definitions. 

a) "Program", below, refers to any program or work distributed under the terms
of this license.

b) A "work based on the Program", below, refers to either the Program or any
derivative work under copyright law.

c) "Modification", below, refers to the act of creating derivative works.

d) "You", below, refers to each licensee.

1. Scope.   
This license governs the copying, distribution, and modification of the
Program. Other activities are outside the scope of this license; The act of
running the Program is not restricted, and the output from the Program is
covered only if its contents constitute a work based on the Program.

2. Verbatim copies.   
You may copy and distribute verbatim copies of the Program as you receive it,
in any medium, provided that you conspicuously and appropriately publish on
each copy an appropriate copyright notice; keep intact all the notices that
refer to this License and to the absence of any warranty; and give any other
recipients of the Program a copy of this License along with the Program.

3. Modification and redistribution under closed license.   
You may modify your copy or copies of the Program, and distribute the
resulting derivative works, provided that you meet the following conditions:

a) The copyright notice and disclaimer on the Program must be reproduced and
included in the source code, documentation, and/or other materials provided in
a manner in which such notices are normally distributed.

b) The derivative work must be clearly identified as such, in order that it
may not be confused with the original work.

c) The license under which the derivative work is distributed must expressly
prohibit the distribution of further derivative works.

4. Modification and redistribution under open license.   
You may modify your copy or copies of the Program, and distribute the
resulting derivative works, provided that you meet the following conditions:

a) The copyright notice and disclaimer on the Program must be reproduced and
included in the source code, documentation, and/or other materials provided in
a manner in which such notices are normally distributed.

b) You must clearly indicate the nature and date of any changes made to the
Program. The full details need not necessarily be included in the individual
modified files, provided that each modified file is clearly marked as such and
instructions are included on where the full details of the modifications may
be found.

c) 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.

5. Implied acceptance.   
You may not copy or distribute the Program or any derivative works except as
expressly provided under this license. Consequently, any such action will be
taken as implied acceptance of the terms of this license.

6. NO WARRANTY.   
THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE
PROGRAM AS PERMITTED ABOVE, BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
INABILITY TO USE THE PROGRAM (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT, EVEN IF SUCH HOLDER OR OTHER PARTY HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.