Questions tagged [multi-licensing]

Works can be released under two (or more) licenses, which may or may not be compatible, giving recipients the choice of which terms they will abide by

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72
votes
2answers
12k views

Why is CC BY-SA discouraged for code?

Everybody knows that you shouldn't use a CC BY-SA license on your code. Even the Creative Commons folk recommend against it. What I don't know or understand is why. I can't seem to find any ...
40
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3answers
1k views

Can I “Override” a licensing policy?

On many sites, especially Stack Overflow, I can't help but notice such amazing code snippets. However, they come with a "catch" designed by the author. With user contributions being licensed with the ...
20
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2answers
312 views

Will a dual license lock me in to a provider?

I want to use open source software for my business, and it is dual licensed. If I choose the paid license which provides support for any changes we require, will this mean that we are unable to change ...
18
votes
1answer
389 views

Do Stack Exchange’s ToS mean that the user-generated content is double-licensed to them?

In the ToS of Stack Exchange sites, under the section Subscriber Content, the first sentence states that my submitted content is licensed (to Stack Exchange) under CC BY-SA 3.0: You agree that all ...
15
votes
4answers
193 views

What is the most concise unambiguous way to represent dual licensing of a work?

I publish photos under multiple Creative Commons licenses and often want to indicate the licensing in a short caption or comment on the photo online or in print. If one of them is dual licensed, how ...
14
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5answers
1k views

May someone else apply a license to CC0 material?

Alice licensed her work under CC0 1.0. May Bob take Alice’s work and publish it under another Creative Commons license (e.g., CC BY-SA)? If yes, may Bob publish it under his own name (i.e., not ...
13
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3answers
198 views

Can paid-for Open Sourcing be a viable model for a freelancer?

Open sourcing doesn't necessarily mean that you give away your source code for free. I am wondering about the business model where your code is made public, free for personal/hobby use, but with a ...
11
votes
3answers
324 views

Can I apply one license to specific users and another to others?

Suppose I am a developer. I am developing a piece of software. I decide I want to make this code open source. But... I only want developers (or people that will be using the code in other projects) to ...
10
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1answer
2k views

Is it possible to restrict GNU GPLv3 to non-commercial use only?

I've noticed that the jQuery plugin "Fancybox" has a peculiar licensing note in its header: // Licensed GPLv3 for open source use // or fancyBox Commercial License for commercial use // // http://...
10
votes
1answer
1k views

License to use for smaller GitHub repos

I frequently create programs to process my local files in some fashion. About half of them are Bash shell scripts under 100 lines, others may be longer, include multiple files, or even be in other ...
9
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3answers
2k views

What is the meaning of two licenses in a maven pom?

Maven allows several licenses in its license block e.g. <licenses> <license> <name>GPL-3.0</name> </license> <license> <name> Beerware</...
9
votes
2answers
656 views

Does it make sense to license my content under a more restrictive license if it's licensed CC-BY-SA?

Let's say that I make a post on a Stack Exchange site. That content is owned by me, but I gave the company a perpetual and irrevocable license under Creative Commons Attribution Share Alike 3.0. As ...
9
votes
4answers
197 views

If something is licensed to me under two (Open Source) licences, can I redistribute under only one?

I have modified a particular file (A LaTeX Beamer Template) The readme says: The code of the package is dual-license. This means that you can decide which license you wish to use when using the ...
8
votes
1answer
1k views

As owner of GPL library, can I break the licensing terms?

As far as I understand, choosing GPL licence for library does not permits use of it in proprietary programs as opposed to LGPL. So releasing my library (or code classes), I'm forcing people to use ...
8
votes
3answers
252 views

Licensing Community Wiki Posts at Stack Exchange

A while back, I ask this question: Can I Override a licensing Policy? I determined that instead of stating a license on a profile page, it dual-licenses the content posted by that user, instead of ...
8
votes
1answer
434 views

Possibility of non-commercial ‘open-source’ and attribution based licence

I am currently planning to launch an alpha version of the software as a representative of an unregistered company. We (currently I'm the only person on the team) do not have any patents and are not ...
8
votes
1answer
199 views

Dual license compatibility

Suppose I place work I publish under two licenses. If the two have conflicting attributes which property should be used. Can you specify which properties you want two be applied from the two licenses?...
8
votes
2answers
989 views

Can software be both MIT licensed and in the public domain?

docopt.rs is dual-licensed under the MIT and Unlicense. How can the software be both copyrighted and in the public domain? Is this an example of invalid licensing?
8
votes
1answer
147 views

How to license Stack Overflow contributions as permissive as possible? [duplicate]

Important: this related Meta Stack Exchange post. Code you post on Stack Overflow is licensed "cc-by-sa 3.0 with attribution required". Now this may pose problems for people wanting to use my ...
8
votes
2answers
2k views

License header for dual-licensed (AGPL or “non-free”) source code

For one of my products I plan to move from a commercial-only to a dual licensed license model: GNU Affero General Public License (AGPL) or a "non-free" license. I can imagine two options for the ...
7
votes
2answers
386 views

Is it legal to use code from Microsoft Knowledge Base Article in an open source software?

In an open-source software project, GPL2 or 3, is it legal to use code snippets from Microsoft Knowledge Base articles - the ones that used to be called something like Q1234567, nowadays called just ...
7
votes
1answer
167 views

How to Audit licensing of old project?

I manage a project with a very long open source history - Zikula (and https://github.com/zikula/core). Zikula grew out of PHPNuke and PostNuke. Most of the oldest code is long gone, but some legacy ...
7
votes
2answers
533 views

Using GPL-ed library from code with more permissive license (MPL-2)

I'm writing a library and a tool on top of it, and I would like to release both under MPL-2. However, the library has an optional dependency, another library which is released under GPL (not LGPL). I ...
6
votes
2answers
2k views

Combining GPL with non-commercial license

I've been a hobbyist programmer for a long time, and only recently have I been writing code I've thought others might benefit from. Here's my conundrum: I'm a big supporter of the GPL, and I ...
5
votes
2answers
530 views

Dual license or relicense when the new license is more permissive?

An organization is considering changing the license of an OSS repo on GitHub. For the purposes of this question, assume that organization has the legal rights to change the license. It is currently ...
5
votes
1answer
671 views

Can I dual license my code under the AGPL and the CPAL? If so, how?

I'm beginning work on a web application at the moment which ideally I'd like to dual license under the terms of the AGPL and the CPAL. This would mean that anyone using the code in their own web ...
5
votes
2answers
205 views

Licence for open-source code which is part of proprietary code?

I've a proprietary program which is using OOP classes which I want to publish as FOSS (only the classes). Which FOSS compatible license I can choose for the classes which will work with my ...
5
votes
1answer
343 views

Does using an AGPLv3-licensed library prevent me from dual-licensing my own source code?

I wrote some software (a simple command-line utility) and released the source code under the following zlib-style open source license: Permission is granted to anyone to use this software for any ...
4
votes
2answers
257 views

License similar to GPL, but allowing to incorporate into the commercial version

Continuing this question: I want a license L which is generally like GPL, but allows us to do the following: License our software under both L and a commercial license. Require that every patch (or ...
4
votes
2answers
151 views

Do anything with this free beer except generate revenue, for that you'll need to purchase an additional beer license?

Background I'm working on a talk, complete with an accompanying resource pack and website. I've never released anything I believe to be of some actual significant monetary value to anyone else before ...
4
votes
2answers
209 views

Under what conditions can someone dual licence existing works?

When software is diffused under an open-source licence I imagine that a project becomes the "intellectual property" of the community. However, I'm not clear about this answer in that an author agrees ...
4
votes
2answers
201 views

Commercial AGPL application

I'm developing an application using iText. iText, unless a commercial license is purchased, forces you to abide by the AGPL. My plan is to sell commercial pre-compiled copies of my software at a small ...
4
votes
1answer
1k views

Is license compatibility a partial order?

When we say that some license X is (one-way) compatible with another license Y, I gather that we often intend for compatibility to be transitive; that is, given some other license W which is ...
4
votes
1answer
1k views

Is dual licensing a software that contains gpl programs possible?

I have seen that there is a question about gpl and dual licensing, but I know copyleft can behave different depending on the shape of the software. so here's my question: I have a package of lua ...
4
votes
1answer
610 views

What does the Zstandard dual license mean?

I am looking at the Zstandard library and it says that it is dual licensed, BSD and GPLv2. What does it mean? If I use libraries in a non open source program will the license be GPL or BSD? In the ...
4
votes
2answers
1k views

Clarification: Dual licensed under the MIT or GPL Version 2 licenses

I've been reading the differences between these two licenses for a few hours now and it is still quite not clear to me how this duality works. As far as I understood, the MIT license basically gives ...
4
votes
2answers
96 views

What is the way to handle a project that is a mix of software and non-software items?

Our project is partly software, and partly 3d models and images. To me, the language of the MIT license, which specifically refers to software, doesn't really seem applicable to the parts that aren't ...
4
votes
1answer
117 views

Licensing under “version X or later”

Is it a GPL-only thing or can I use this formulation with any license, like "MPL 2 or later"? Does it mean that in case versions 1, 2 & 3 of license are available, "version 1 or later" effectively ...
4
votes
2answers
126 views

How to license programming assignments permissively, while preventing solutions from being published?

I have created a few practical programming assignments for a bachelor's course in computer science, which I'm quite proud of. I'd love for my work to be used anywhere, and for any future teachers or ...
4
votes
1answer
75 views

Do you have to specify dual licensing before releasing open source software?

I'm working on an open source project I'd like to release at some point. I am going to license it under the AGPL v3, but I'd like people to have the option to pay for private development which only ...
4
votes
0answers
33 views

What might be the licence for OpenAI model generated code snippets?

I saw an interesting video on computer-generated code snippets. The model has been trained on thousands of open source GitHub repositories. In the video, an AI model produced some small code ...
4
votes
2answers
76 views

Wiki template licensing?

I do some editing for Wiki A, which is generally licensed in a typical wiki fashion: Content is available under GNU FDL 1.3 unless otherwise noted. Wiki B uses some templates I'd like to copy for ...
3
votes
2answers
138 views

Adding a very minor part of GPL3 code to a BSD-licensed project

I am porting a library that somebody else released under BSD-3 license from Fortran to C++. In order to make it run easily under C++, I am using an interface that is only a very minor and almost ...
3
votes
1answer
129 views

Is this restriction of Cheerp community edition in violation of GPLv2?

As I understand, Cheerp is a tool in a similar way it is GCC, licensed with GPLv2. The license applies to the work reached by the copy rights, but not for use restrictions. So, as long as one does ...
3
votes
2answers
608 views

Can my thesis LaTeX source files contents be under GPL v3?

I want to release all the LaTeX source files (*.tex), when I publish my thesis. I do not want to just release the PDF. So everybody can build my thesis with a LaTeX compiler from its source code. Can ...
3
votes
2answers
755 views

Python package with different licenses per modules, some with GPL: is a global GPL license required?

I'm in a situation a bit similar to this one, but more precisely I developed a Python package with multiple modules. Some of them have dependencies under GPL, therefore "infecting" this specific ...
3
votes
1answer
698 views

Is it safe to use FreeType inside a proprietary closed-source software?

Many of libraries, that have LGPL or permissive licenses, depends on FreeType, that have multi-licensing (FTL/GPL). My question is: if FreeType can be used under any of these licenses, can someone ...
3
votes
2answers
88 views

JPEG comment to convey Copyleft Multi-Licenced Copyright Notice

This question is related to Copyleft Multi-Licenced Copyright Notice. I upload pictures on commons.wikimedia.org and I want to facilitate the reuse but I want derivatives stay "libre". Therefore I ...
3
votes
2answers
65 views

Copyleft Multi-Licenced Copyright Notice

I want to allow any usage/modification/distribution of my work except with the restriction that my work and derivatives must stay "libre". Therefore I think the right way is to publish my work under ...
3
votes
1answer
166 views

Suitable license for open-source game with proprietary content

I am developing a 2D sidescroller game for mobile platforms and am trying to figure out the best licensing option for this situation: My desire is to make the game's source code open-source, but the ...