Re: modification of zlib/libpng license, is this legally usable?
This is okay as long as you don't call the result as
"ZLib/libpng License", but always note that any
restrictions like the 4th clause will render the
program non-free!
--- Anders Bergh <anders1@gmail.com> writes:
> Hi
>
> I've modified the zlib/libpng license to be a bit
> more restrictive for commercial usage.. I would like
> to get some feedback, and I also wonder if it's
> legally "usable".
>
> <LICENSE>
>
> Copyright (c) <year> <copyright holders>
>
> This software is provided 'as-is', without any
> express or implied warranty.
> In no event will the authors be held liable for any
> damages arising from the
> use of this software.
>
> Permission is granted to anyone to use this software
> for any non-commercial
> purpose, and to alter it and redistribute it freely,
> subject to the following
> restrictions:
>
> 1. The origin of this software must not be
> misrepresented; you must not
> claim that you wrote the original software.
> If you use this software in a
> product, an acknowledgment in the product
> documentation would be
> appreciated but is not required.
>
> 2. Altered source versions must be plainly
> marked as such, and must not be
> misrepresented as being the original
> software.
>
> 3. This notice may not be removed or altered
> from any source distribution.
>
> For commercial usage these restrictions applies
> aswell:
>
> 4. You must have written permission by the
> respective copyright holders
> for using this software.
>
> 5. The usage of this software must be
> acknowledged somewhere easily
> accessible for the end user, such as the
> about box or product
> documentation.
>
> </LICENSE>
>
> Anders
>
>
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