[Paraview] legal summary

[Dominik Szczerba]

Actually that was never clear to me in GPL in general. If I develop 
something for in-house use only then there is nobody to give my code to. 
But the code is potentially employed for commercial purposes (including 
generation of income) so it IS being used as a commercial tool, only not 
distributed.

<sigh/>

Dominik

Berk Geveci wrote:
> One comment:
> 
>> 2) You do not have a Qt license and you have modified/derived Qt based code:
>> You must make your source code available to users under the terms of the GPL
>> (including ParaView source, which they do anyway).
> 
> The GPL license says that you have to provide the source under GPL to
> those you distribute binaries. If you are developing a
> plugin/extension for in-house use using GPL'ed Qt, you do _not_ have
> to distribute your source to the outside world. Trolltech has never
> been clear on this issue. They say that if you are developing
> commercial tools, you have to have the commercial license. This is
> only true when it comes to distribution. It does not apply to in-house
> tools.
> 
> -berk
> 
> 
> On Wed, Nov 5, 2008 at 8:35 AM, John Biddiscombe <biddisco at cscs.ch> wrote:
>> To summarize, within the framework of paraview plugin development
>>
>> 1) You do not modify/derive from or create any Qt based code :
>> You can distribute your software under your own terms, GPL or other. Users
>> must have access to the ParaView source, which they do anyway, your software
>> does not have to be open source.
>>
>> 2) You do not have a Qt license and you have modified/derived Qt based code
>> :
>> You must make your source code available to users under the terms of the GPL
>> (including ParaView source, which they do anyway).
>>
>> 3) You have a Qt license:
>> You can keep the source code closed and distribute anything (Qt based or
>> otherwise) you want under your own terms.
>>
>> 4) You may separate plugins which make use of Qt based code from others
>> which do not, and distribute them on different terms, according to the first
>> 3 statements.
>>
>> I welcome corrections to the above 4 statements, preferably in as simple a
>> form as possible.
>>
>> JB
>>
>> --
>> John Biddiscombe,                            email:biddisco @ cscs.ch
>> http://www.cscs.ch/
>> CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
>> Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82
>>
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>>
>>
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-- 
Dominik Szczerba, PhD
Computational Physics Group
IT'IS Foundation for Research
http://www.itis.ethz.ch