On Mon, 9 Nov 2015 22:39:41 +0100 Jochen Sprickerhof wrote:

> Hi,

Hello Jochen!

> 
> as part of packaging ROS [1] for Debian, I've found a file [2] under the
> CISST licence [3]. Can someone comment on the DFSG compatibility of it?

I am in a rush, so I'll leave a more thorough and detailed analysis of
the license to other debian-legal regulars. However, I would like to
highlight a few points: see below.
Please note that what I'll express are only my own personal opinions.

[...]
> P.S.: Please Cc me as I'm not on the list.

Done.

> 
> [1] http://www.ros.org/
> [2] 
> https://github.com/ros/cmake_modules/blob/0.4-devel/cmake/Modules/FindXenomai.cmake
> [3] https://cisst.org/cisst/license.txt
> 
> -- %< full copy for reference %< --
> 
> CISST Software License Agreement
> 
> Version 1.0 (October 30, 2006)
[...]
> Your downloading, copying, modifying, displaying, distributing or use
> of any software, documentation, and/or data from CISST (collectively,
> the "Software") constitutes acceptance of all of the terms and
> conditions of this Agreement. If you do not agree to such terms and
> conditions, you have no right to download, copy, modify, display,
> distribute or use the Software.

The license insists that downloading and use require acceptance of its
terms and conditions.
DFSG-free software usually refrain from restricting use or download.

[...]
>    You further agree to use,
>    reproduce, make derivative works of, display and distribute the
>    Software in compliance with all applicable governmental laws,
>    regulations and orders, including without limitation those relating
>    to export and import control.
[...]

The license imposes the licensee to comply with governmental laws,
regulations and orders. This means that, if the licensee violates such
laws, he/she is also violating the license terms: this possibly adds
copyright violation penalties to the penalties already provided for the
violation of the above mentioned laws.
This is not good: a dissident should not be prosecuted for copyright
violation in some foreign jurisdiction, if he/she violated some local
laws in his/her dictatorial country...



-- 
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 There's not a second to spare! To the laboratory!
..................................................... Francesco Poli .
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