kicad-developers team mailing list archive

[Wayne Stambaugh <stambaughw@xxxxxxxxx>]

Javier,

Thank you for the clarification.  Adding the license to each file as a
comment is fine but there are some caveats.

The current symbol library parser will choke on the license comment.  I
can change this fairly easily although that would break the no legacy
file format change mandate that I have imposed on the project.  This
still leaves the stable 4 branch which will also choke on the license
comment.  This will not be an issue when the new symbol library file
format is implemented.  I think in the name of simplicity, we should
just add a license file to the repo until the new file format is
implemented.  Even if I change the parsers, it still does not address
the fact the the formatter will not preserve the comments when editing
the symbol libraries so the license comment would have to be added manually.

There are no issues with adding a license comment to the pretty
footprint file format.  However, the legacy footprint file parser will
also likely choke on any comments at the top of the file and I
definitely do not want to change that code.

I cannot comment on our 3D model parsers.  I'm assuming that since these
files are standard formats that they support comments and our parsers
will be fine reading any comments in the files but I cannot guarantee this.

Cheers,

Wayne

On 6/28/2017 8:57 AM, Javier Serrano wrote:
> Hi, as a reminder, here are the texts we proposed:
> 
> For schematics symbols and for complete symbol libraries:
> 
> "This work is licensed under the Creative Commons CC-BY-SA 4.0 License.
> To the extent that circuit schematics that use Licensed Material can be
> considered to be ‘Adapted Material’, then the copyright holder waives
> article 3.b of the license with respect to these schematics."
> 
> For footprints and libraries of footprints:
> 
> "This work is licensed under the Creative Commons CC-BY-SA 4.0 License.
> To the extent that circuit layout that uses Licensed Material can be
> considered to be ‘Adapted Material’, then the copyright holder waives
> article 3.b of the license with respect to this layout."
> 
> Now I notice that this thread initially dealt with 3D models, which are
> neither symbols not footprints. If you see in the proposed texts above,
> for dealing with the case of 3D models, we should find an expression
> which denotes the complete 3D representation of a circuit, which uses
> the licensed 3D models. Any thoughts about what that expression should
> be? For example, if the term we use is "3D circuit model" then the text
> for licensing the 3D models of components would be:
> 
> "This work is licensed under the Creative Commons CC-BY-SA 4.0 License.
> To the extent that a 3D circuit model that uses Licensed Material can be
> considered to be ‘Adapted Material’, then the copyright holder waives
> article 3.b of the license with respect to this 3D circuit model."
> 
> Regarding where to put these notices, there is first a choice that needs
> to be made: per component or per repo? I think per component makes more
> sense because a component can have a life of its own outside the
> original repo, and ideally the license information would travel with the
> component wherever it goes. For symbols, the text could be in a
> property. For fooprints, it could be a comment in the "pretty file". For
> 3D models, I don't know. One could also include a license file per repo,
> to make it simpler for users to see it.
> 
> I hope this helps. As you see, there are some strategic decisions to be
> taken at the project level. Back to you Wayne ;)
> 
> Cheers,
> 
> Javier
> 
> 
> On Wed, Jun 28, 2017 at 2:35 PM, Wayne Stambaugh <stambaughw@xxxxxxxxx
> <mailto:stambaughw@xxxxxxxxx>> wrote:
> 
>     Oliver,
> 
>     I don't make any claims to be a legal expert but I believe that adding a
>     LICENSE file to each repo should suffice.  Perhaps our friends and CERN
>     could comment on this if I am mistaken.
> 
>     Cheers,
> 
>     Wayne
> 
>     On 6/28/2017 7:24 AM, Oliver Walters wrote:
>     > Wayne, Maciej, et al,
>     >
>     > This has been sitting in my //todo for a while. Can I get some
>     > clarification on the LICENSE issue and then I will ensure it is applied
>     > to the repos:
>     >
>     > Am I correct in my understanding that the following text is ALL that is
>     > required (placed within a LICENSE file in each repo)?
>     >
>     >     "This work is licensed under the Creative Commons CC-BY-SA 4.0 License.
>     >     To the extent that circuit schematics that use Licensed Material can be
>     >     considered to be ‘Adapted Material’, then the copyright holder waives
>     >     article 3.b of the license with respect to these schematics."
>     >
>     >
>     > Or is this an addendum required to be made and I am required to include
>     > the entire CC-BY-SA text?
>     >
>     > Regards,
>     > Oliver
>     >
>     > On Tue, Apr 11, 2017 at 6:41 AM, Wayne Stambaugh <stambaughw@xxxxxxxxx <mailto:stambaughw@xxxxxxxxx>
>     > <mailto:stambaughw@xxxxxxxxx <mailto:stambaughw@xxxxxxxxx>>> wrote:
>     >
>     >     I prefer the former.  Adding the license to fields would be cumbersome.
>     >
>     >     Cheers,
>     >
>     >     Wayne
>     >
>     >     On 4/10/2017 4:43 PM, Maciej Suminski wrote:
>     >     > The easiest way to include the license is to put a file containing the
>     >     > text in the libraries repository. Alternatively, the text could be
>     >     > stored in the 'License' field for symbols or 'Doc' property for
>     >     > footprints, but it feels a bit too wordy to me.
>     >     >
>     >     > Cheers,
>     >     > Orson
>     >     >
>     >     > On 04/07/2017 11:55 AM, Javier Serrano wrote:
>     >     >> On Sun, Feb 26, 2017 at 6:21 PM, Wayne Stambaugh
>     >     <stambaughw@xxxxxxxxx <mailto:stambaughw@xxxxxxxxx>
>     <mailto:stambaughw@xxxxxxxxx <mailto:stambaughw@xxxxxxxxx>>>
>     >     >> wrote:
>     >     >>
>     >     >>> I'm still waiting for our friends at CERN for an answer on
>     library
>     >     >>> licensing.  We are leaning towards CC-SA with the use
>     exception
>     >     clause.
>     >     >>> I turning out to be the longest time ever to write a single
>     >     sentence. ;)
>     >     >>>
>     >     >>
>     >     >> OK, better late than never. Here are the proposals:
>     >     >>
>     >     >> For schematics symbols and for complete symbol libraries:
>     >     >>
>     >     >> "This work is licensed under the Creative Commons CC-BY-SA 4.0
>     >     License.
>     >     >> To the extent that circuit schematics that use Licensed
>     Material
>     >     can be
>     >     >> considered to be ‘Adapted Material’, then the copyright
>     holder waives
>     >     >> article 3.b of the license with respect to these schematics."
>     >     >>
>     >     >> For footprints and libraries of footprints:
>     >     >>
>     >     >> "This work is licensed under the Creative Commons CC-BY-SA 4.0
>     >     License.
>     >     >> To the extent that circuit layout that uses Licensed
>     Material can be
>     >     >> considered to be ‘Adapted Material’, then the copyright
>     holder waives
>     >     >> article 3.b of the license with respect to this layout."
>     >     >>
>     >     >> This assumes we want a "weak copyleft" regime for
>     libraries, i.e.
>     >     we want
>     >     >> modifications to symbols/footprints/libraries to be published
>     >     under the
>     >     >> same license, but we don't want to force people to publish
>     their
>     >     complete
>     >     >> designs under CC-BY-SA just because they used the KiCad
>     >     libraries. Then
>     >     >> there is the issue of how to embed this information in symbols,
>     >     symbol
>     >     >> libraries, footprints and footprint libraries. I am not
>     competent to
>     >     >> comment on that.
>     >     >>
>     >     >> Cheers,
>     >     >>
>     >     >> Javier
>     >     >>
>     >     >>
>     >     >>
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