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Questions tagged [cc-by-sa]

For questions about the Creative Commons Attribution-ShareAlike (CC BY-SA) licenses.

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92 votes
2 answers
21k 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 ...
RubberDuck's user avatar
  • 5,546
66 votes
2 answers
3k views

Relicensing content under CC-BY-SA

I have compiled a body of work from numerous contributors, who all licensed their individual works to me under CC-BY-SA version 3. Can I now instead redistribute their work under CC-BY-SA version 4?
Prof. Falken's user avatar
36 votes
6 answers
3k views

Can I copy-paste a snippet from Stack Overflow into my GNU-GPL project?

I have found on Stack Overflow a 10-lines block of code that does exactly what I want. There is no license information in the post nor on the answerer's profile page, so the CC BY-SA 3.0 license of ...
Nicolas Raoul's user avatar
30 votes
3 answers
3k views

What do I need to share if I include CC-BY-SA artwork in my software?

CC-BY-SA is a Creative Commons license with a copyleft clause - if you derive something from it, you must also provide the derivative under the same license if you distribute it. The relevant clause ...
congusbongus's user avatar
  • 8,989
26 votes
1 answer
783 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 ...
unor's user avatar
  • 5,700
24 votes
2 answers
4k views

Can I "upgrade" the version of CC BY-SA from 3.0 to 4.0 in my modification?

What I'm doing: I'm adapting a work licensed under CC BY-SA 3.0 Unported license to a different language. I'm indicating the original work and its license. I'm indicating that I have made changes to ...
r3bl's user avatar
  • 1,407
22 votes
1 answer
772 views

What is considered proper attribution for a deleted Stack Exchange post?

When a creator posts content to any Stack Exchange site, they grant Stack Exchange a Creative Commons Attribute Share-Alike license to use (and display and share) the content. This is irrevocable - ...
Thomas Owens's user avatar
  • 1,792
17 votes
1 answer
1k views

How can I license a YouTube commercial which includes CC BY-SA Licensed music?

Context: I'm making a YouTube commercial, which includes some music that's licensed under CC BY-SA 3.0. Would an audio-visual work constitute a derivative work of the music used in it, and (given the ...
William's user avatar
  • 279
15 votes
2 answers
237 views

The Stack Exchange licence: Can I post open source code here?

Stack Exchange applies CC-BY-SA to all posts. How does this interact with free or open source licences? If someone wants to ask a question about a piece of open source software can they post code ...
trichoplax is on Codidact now's user avatar
14 votes
2 answers
1k views

Does the CC-BY-SA License require that source code of derivative works be shared?

For example, if I create a LaTeX file and license it with CC BY SA, can someone create a derivative work, but only publish the PDF, without giving out the derived LaTeX source code? Does this fall ...
Ciro Santilli OurBigBook.com's user avatar
14 votes
2 answers
2k views

Can I post code examples with GPL software on Stack Overflow?

Suppose there is a Python library called g which is licensed under GPL v2.0 (or v3.0). Suppose further that the library is sufficiently complex that it contains some C/C++ component(s) that are ...
Pasha's user avatar
  • 596
14 votes
1 answer
690 views

Selling a book based on CC BY-SA

My company would like to make a book mostly adapted from CC-BY-SA licenced text. I understand this is legal if we distribute the adapted text under the same licence. But what if we add to the book our ...
Mikko Översti's user avatar
14 votes
1 answer
3k views

MIT-licensed project with CC-BY-SA dependency

I have a project (code) that I am wanting to license as MIT. It has a few dependencies, mostly assets (icons and images). Some dependencies are MIT and I include their licenses in the source, but a ...
notme1560's user avatar
  • 243
13 votes
1 answer
394 views

How does re-licensing without the approval of authors work (eg, wikimedia case)?

Wikipedia (and any other Wikimedia product) change to a dual licence since 01/08/2009. As I understand, that implies they redistribute GFDL licensed text in CC-BY-SA without asking every author (wich ...
ESL's user avatar
  • 263
13 votes
2 answers
1k views

Can I use GPL v3 for source code and CC BY-SA v3 for comments?

I have some source code for which I am the copyright holder. I want to release it under the GPL, but when it was closed source, I copied a bunch of a stuff from Wikipedia for a couple of classes and ...
user avatar
11 votes
5 answers
5k views

Do the CC licenses prevent insults?

Most CC licenses allow a change of the material Adapt — remix, transform, and build upon the material for any purpose, even commercially. I am a big fan of CC licenses, because they enable ...
Thomas Weller's user avatar
11 votes
2 answers
881 views

What counts as adaptation for using code licensed under CC BY-SA 4.0 in software licensed under GPLv3?

Since 2015-10-08, GPLv3 is listed as one-way compatible license for CC BY-SA 4.0: […] you may license your contributions to adaptations of BY-SA 4.0 materials under GPLv3, but you may not license ...
unor's user avatar
  • 5,700
10 votes
2 answers
1k views

Will adding a BY-SA image to a blog post make the entire post BY-SA?

I tried to read the license deed but it was too advanced for me to understand. Consider these 2 situations, I take a CC-BY-SA image and upload it to my blogpost it as is, without any modification. I ...
nshunz's user avatar
  • 357
9 votes
3 answers
2k views

Changing my own non-software project from GPLv3 to CC BY-SA

I have a growing project which is a platform for 3D printers. The project contains printable parts and bills of materials. I defaulted to releasing it under GPLv3 without much thinking but since it's ...
McAbra's user avatar
  • 193
9 votes
1 answer
140 views

Attribution for a "2nd generation" derivative work

How do you deal with attribution of a work that is derived from a work that is itself derived from an original work protected under CC BY-SA? And while we're at it, let's push it further: Let's call ...
jadsq's user avatar
  • 193
8 votes
2 answers
1k views

Stack Exchange's CC-BY-SA and Patents

All contributions to the Stack Exchange Websites are released under the Creative Commons Attribution-ShareAlike License (CC-BY-SA), either version 2.5, 3.0, or 4.0 depending on the post date. This ...
The-Coder-Who-Knew-Too-Little's user avatar
8 votes
2 answers
1k views

How to provide credit when modifying a design with a CC BY-SA license?

Background: A few years ago, I've designed a low-cost scientific instrument and published all schematics, building instructions and necessary scripts in open source under the Creative Commons ...
Xavier Mouy's user avatar
8 votes
2 answers
348 views

How do you write an attribution if there's ambiguity over which version of Creative Commons applies?

Currently there's a discussion on Meta over whether or not StackExchange was allowed to retrospectively change their licensing policy from CC SA 3.0 to CC SA 4.0. Presuming that it is indeed an open ...
JonathanReez's user avatar
8 votes
2 answers
245 views

Can I adapt a CC-BY-SA licensed webpage to host rights-reserved copyrighted content?

I think the inverse of What do I need to share if I include CC-BY-SA artwork in my software?. Some webpages, such as Code for America are licensed under CC-BY-SA. If I want to adapt the code for this ...
raphael's user avatar
  • 191
8 votes
1 answer
575 views

In which cases must I relicense my product under the CC BY-SA license?

Because copyright law can encompass a huge range of scenarios and be unclear to talk about in abstract terms, I'm going to give concrete examples. I understand CC BY is a permissive license. All it ...
Zebrafish's user avatar
  • 181
8 votes
1 answer
3k views

Creative Commons license CC BY-SA doesn't work for commercial content?

I'm puzzled by the "share-alike" clause in Creative Commons license. This license allows free commercial use but "require[s] [] adaptations of the work to be released under the same or similar license ...
Wynne's user avatar
  • 591
8 votes
2 answers
3k views

Can I use source code licensed under CC-BY-SA for commercial closed source project?

I want to use some source code under CC-BY-SA for my company's project. That project is commercial and closed source code. I want our project not to have obligation to release the source code. Is this ...
Lee Victor's user avatar
8 votes
0 answers
113 views

Do I have to distribute intermediary formats of my adaption? [duplicate]

There's a website that I really like which is licensed under CC-BY-SA. I've always thought it would work really well as a physical book too, and so I've decided to try to make it happen. I'm planning ...
Yoshi Walsh's user avatar
7 votes
3 answers
776 views

CC-By-SA: Can the author update his past creation when updating his name?

I'm working at Pl@ntNet which contributes a lot of plant observations (around 20M) online under cc-by-sa. On the app, a user can edit their profile and change their display name. But doing so will ...
Hugo Gresse's user avatar
7 votes
3 answers
996 views

Can I license artwork that has a mixture of CC BY-SA, public domain, CC0, Pexels licensed images under CC BY-SA?

I have created some artwork that uses images mostly licensed under variations of CC BY-SA. There are also some public domain, CC0, and rarely images from Pexels/similar "free to use" sites. ...
ReedThomasArt's user avatar
7 votes
2 answers
429 views

Does CC BY-SA affect recordings of performances of songs?

If I write, and publish sheet music for, a hymn under CC BY-SA, and it is sung in a church, and the church records their services, does the recording have to be CC BY-SA? If so, can I avoid this while ...
Someone's user avatar
  • 307
7 votes
1 answer
2k views

Can a YouTube video use images licensed under Creative Commons Share Alike (CC BY SA) and not be an adaptation?

I plan to create YouTube videos where the idea is to explain current affairs using the following approach. Use of animations, text content and images as the visual part. The voiceover which narrates ...
Jay's user avatar
  • 173
7 votes
1 answer
1k views

How can I use programming documentation without infringing copyright?

I have a really hard time understanding how can I use copyrighted programming documentation, tutorials, articles, blogs, etc. presented as text or video, without infringing copyright? I will explain ...
marianc's user avatar
  • 193
7 votes
1 answer
736 views

Using CC-BY-SA images in a CC-BY-NC-SA document

I am creating a presentation that includes some unmodified images licensed under either CC-BY, CC-BY-SA version 2.0, 3.0 or 4.0 (no CC-BY-SA 4.0) and some public domain images. They are all attributed....
P. Scwurf's user avatar
7 votes
1 answer
94 views

In a Wikipedia article am I able to insert information licensed with CC BY even though they use a CC BY-SA license?

Background: While writing an article on Wikipedia I needed to include text that is licensed under a CC-BY license. After a bit of digging I found that Wikipedia uses a CC BY-SA license. Question: ...
Trevor Clarke's user avatar
7 votes
1 answer
185 views

Can I license Latex code under GPL but the content under CC BY-SA?

I have written a non-trivial scientific text for university. It is written in Latex and I want to make the source available under GPL (v3 if that matters) so other can learn from my Latex skills. ...
corvus_192's user avatar
7 votes
2 answers
1k views

Creative Commons ShareAlike, weak or strong copyleft?

I am wondering whether Creative Commons ShareAlike is a weak or strong copyleft license. That is, does it allow linking with code with under a different license?
nijoakim's user avatar
  • 173
6 votes
3 answers
1k views

Does every adaptation of a CC BY-SA work violate its terms?

I read somewhere (I cannot recall where) that licensing a work under a Creative Commons license (or any license, really) is like adding a second license on top of the "license" that ...
huanglx's user avatar
  • 161
6 votes
1 answer
534 views

Is HTML-linked content still subject to the CC-BY-SA license?

If someone links to a Github or Gitlab repo in a Stackoverflow post, or a Github or Gitlab gist, is the contained content CC-BY-SA? Let's say I am the sole author of the code on Github/Gitlab? For a ...
NextNightFlyer's user avatar
6 votes
2 answers
628 views

What license for code resembles CC BY-SA most?

With the rise of much licensing debate around here on Stack Exchange, there's been a lot of arguments about having a license closest to the status quo. Initially, I would've thought that the closest ...
Zizouz212's user avatar
  • 6,590
6 votes
1 answer
358 views

Must CC BY-SA be included for ideas and code taken from Stack Overflow?

I'm still unclear about licensing. If I have a project on Github that's licensed under GPL and found pseudocode on a Stack Overflow question, must I now dual license my code on Github and GPL as ...
inertiablobby's user avatar
6 votes
1 answer
531 views

GFDL and CC BY-SA compatibility and Use

For Free/Opensource documentation, There are two license widely used. GNU Free Documentation License Creative Commons BY-Share Alike Both say re-distribution must be under same license as GFDL is ...
Pandya's user avatar
  • 2,102
6 votes
1 answer
517 views

A non-bloated license for documentation with the benefits of GPL?

In response to one of the FAQs, FSF has noted: It is possible to use the GPL for a manual, but the GNU Free Documentation License (GFDL) is much better for manuals. The GPL was designed for programs; ...
ACat's user avatar
  • 1
6 votes
1 answer
143 views

Quoting your own content (in your own work, licensed under CC BY-SA 3.0) to avoid licensing it

Bob writes an article and licenses it under CC BY-SA 3.0. Certain laws can permit Bob to include someone else’s content in his article, even if this content isn’t compatibly licensed. For example, ...
unor's user avatar
  • 5,700
5 votes
2 answers
1k views

Clarifying "Share Alike" in CC licenses

I am working on some materials for sale to history teachers. I have found a map that has a: CC BY-SA 3.0 ...licensed attached. I am not adapting the map or altering it in any way. My understanding ...
Jason's user avatar
  • 53
5 votes
1 answer
606 views

CC BY-SA 2.5 License marked as denied license in the FOSSA tool after upgrading to React Native 0.74 version

We have an existing React Native project that was upgraded from 0.71.0 to 0.74.0 latest version. We are us a tool FOSSA to scan the license-related issues in the NPM libraries used in the project. We ...
Mehul Patel's user avatar
5 votes
1 answer
1k views

Does the Creative Commons CC BY-SA 4.0 license make it mandatory to share derived work?

Let's say that I'm using art works protected by the Creative Commons CC BY-SA 4.0 license. I then modify the art works so that they fit my personal requirements and include them in a commercial ...
ackh's user avatar
  • 161
5 votes
2 answers
762 views

Using CC BY SA video with my own copyrighted music

I am a music producer and am releasing an album shortly of which I own the copyright to the tracks (although some Master Recordings are signed to a record label in a commercial agreement). I would ...
Aaron's user avatar
  • 51
5 votes
3 answers
206 views

How do I stop republication under a different license?

Suppose I am finishing an open source software. I am about to publish it but I just have to choose the license. I want it to be a CC-BY license but I don't want anyone to republish it under ANY other ...
Trevor Clarke's user avatar
5 votes
1 answer
342 views

Company policy says no code under license requiring sharing source can be used. Stack Overflow is CC-BY-SA. Does this mean we can't use SO at work?

Training at work regarding software licensing instructed us that we should not use code from any project using a license that requires sharing modifications such as the GPL. We can use Linux as an OS ...
mngeek206's user avatar
  • 417