On 06/25/2014 12:46 PM, Louis Bettens wrote:
> Dear Andreas,
> 
> Le 24. 06. 14 11:22, Andreas Herrmann a écrit :
>> The hdf5 library itself has a license that I would call free. It permits
>> redistribution in source, or binary form, with or without modification,
>> basically only requiring that the original copyright notice and license is
>> shipped along with it [1].
>> Tables is licensed under a BSD license [2]. I think that one is generally
>> accepted as a free license.
>> Only szip has an unfree license, because it doesn't allow for commercial
>> use [3]. But whether you build hdf5 with or without szip doesn't change the
>> license of hdf5, or tables.
> 
> This makes me wonder what /free/ means. I don't consider it free either,
> but the Microsoft Research Licence Agreement [4], possibly amongst
> others, is included in lib.licenses and applies to verifast [5] and z3
> [6], and it prohibits commercial use too. I agree that there are other
> differences between these licenses, but still, what does Nixpkgs/NixOS
> accept as free software ?
> 
> Bonus question : Is http://nixos.org/nixpkgs/manual/#sec-meta-license
> deprecated ?

meta.license is not deprecated, why would it be? There are multiple
GitHub issues dealing with migration from strings to lib.licenses.…  for
the purpose of meta.license field and it's used in various places. The
manual does list a few licenses which don't currently exist or have been
renamed so that needs updating.

> Tchüs,
> 
> Louis
> 
> [1]: http://www.hdfgroup.org/HDF5/doc/Copyright.html
> [2]: http://www.pytables.org/moin/FAQ#WhatarePyTables.27licensingterms.3F
> [3]: http://www.hdfgroup.org/doc_resource/SZIP/Commercial_szip.html
> [4]: http://research.microsoft.com/en-us/projects/pex/msr-la.txt
> [5]:
> https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/science/logic/verifast/default.nix
> [6]:
> https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/science/logic/z3/default.nix
> 


-- 
Mateusz K.
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