Questions tagged [license-compatibility]

License compatibility is the comparison of two or more licenses to determine if certain usages and actions can be made. Use this tag if the question would like to determine the compatibility of licenses, or their individual clauses.

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15
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2answers
5k views

Why is GPLv2 incompatible with GPLv3?

As I understood in this wonderful answer, GPLv3 and GPLv2 code can't be used simultanously in the same product. Why?
6
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1answer
582 views

CDDL1 and GPL2 + classpath exception incompatible with GPL3?

I am about to decide on the license I can attribute to my free-libre open source software (FLOSS). I have used the Stanford Core NLP released as GPL3+. I have also used the JAXB API which, although ...
18
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1answer
892 views

Can I release under AGPL a program that uses a GPL library?

I just wrote a program that embeds and uses a GNU-GPL library (GPLv3 or at your discretion any later version). Can I release my program under the GNU AGPL v3 license?
8
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1answer
1k views

Adding feature to an Apache v2 package

I'm working on one npm package based on another one but with another approach, this package is licenced under Apache v2 and I want to use MIT. After some use of my package I've noticed I need to use ...
16
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2answers
3k views

Combining code written under different licenses (Eiffel Forum License, MIT and Apache), what are my options?

So I'm new to all this licensing jazz, and I've just started work on a project I'd like to one day publish as open source. I've found a couple of projects so far that have code to accomplish stuff ...
18
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3answers
11k views

If I'm using a GPL 3 library in my project, can I license my project under MIT license?

If I'm using a library that is licensed under GPL v3 in my project, can I license my project under the MIT license? I tried to read the GPL v3 text but I cannot understand it without your assistance.
9
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3answers
4k views

is CC BY license GPL compatible? CC BY vs CC0

CC0 license is GPL compatible. A component with such license can be included in GPL-licensed product. Is this true also for CC BY license? What is the difference between CC0 and CC BY licenses? ...
5
votes
3answers
237 views

Does a CC BY-SA 4.0 specification lose any AGPL3+ benefits?

If I release a program specification [1] under the AGPL, and the program itself under the AGPL, the two are obviously compatible: I can develop them at the same time, copy text (for example, method ...
13
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4answers
621 views

Are licenses affected if the author adds conflicting clauses alongside?

I see this one quite a lot: an author releases something under a standard free/open license (i.e. not a crayon license), but on the same release page adds a clause that conflicts with the license. I.e....
22
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3answers
1k views

Copyfree Open Innovation License compatibility

I'm interested in the Copyfree Open Innovation License as a simpler alternative to Apache 2.0 (it is a permissive license with an explicit patent grant). But because it's not so popular, not much ...
18
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2answers
5k views

Can I link a Apache 2.0 library into software under GPLv2?

The Apache 2.0 License has a built-in linking exception: For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to ...
13
votes
1answer
518 views

Is there a reason to prefer the SimPL over the GPL? Does it carry the same legal weight?

I just came across the SimPL License which is described as: This Simple Public License 2.0 (SimPL-2.0 for short) is a plain language implementation of GPL 2.0. The words are different, but the ...
5
votes
1answer
102 views

Integrating code without a patent license into a code base with a patent license

What issues are involved when taking code from (for example) MIT licensed code and including it in a Apache 2.0/GPLv3 licensed project. Does that mean that there is simply no patent license granted? ...
16
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4answers
388 views

Does a host application's license apply to plug-ins written for it?

This was prompted by another question which reminded of a past experience. Consider the following: An open-source project supports a plug-in architecture The project is released under a copyleft ...
14
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3answers
1k views

How does one combine differently licensed code in one open source program?

I'm the author of WorldPainter. It's licensed according to the GPL v3, but I am about to include some code (dynmap) that is licensed according to the Apache License version 2.0. According to both ...
8
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2answers
226 views

When does a forked project require a license?

I haven't quite grasped the implications of forking a licensed project to public. I am assuming that a similar license should be kept, but what happens if that's not possible? Edit I am providing ...
4
votes
1answer
260 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 ...
9
votes
2answers
217 views

How to deal with unofficial/proprietary licences - are open source projects of this type really open?

Recently I was confronted with several projects that claim to be open source. I was happy to find their source code on a public repository but when looking at the license I was wondering why they do ...
7
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2answers
296 views

Can I make a derived work of a GPL project and a non GPL project for personal use?

In the GNU General Public License, version 2, some limits on how you can modify the Program are listed. Point 2.b states that (emphasis mine): You must cause any work that you distribute or publish,...
8
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1answer
136 views

Why is the CC sampling+ license incompatible with other CC licenses?

Creative Commons used to publish a license called "Sampling Plus", but according to this page, it was retired/deprecated in 2011 due to inadequate demand and "Not compatible with any other CC license"....
7
votes
2answers
88 views

What prevents the community converging on a small set of licenses?

By a quick count, wikipedia lists almost fifty different open source / free software licenses. Assuming (and this may not be valid) that many of these licenses were created in the early days of the ...
22
votes
1answer
4k views

What are the differences between GPL V2 and V3 licenses?

One of the most widely used and most popular free and open source software licences is the General Public License. I want to know in simple terms: what are the differences between GPL Version 2 and ...
7
votes
1answer
49 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: ...
12
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2answers
109 views

Can I have one license cover part of a software and another covering the other half?

Scenario: Lets say I have a software I have been developing. I am about to release it but I first have to apply some licenses. Question: Suppose I want to release part of the software (the code) ...
7
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1answer
163 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?...
17
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2answers
1k views

Are permissive licenses (MIT/BSD/zlib) compatible with CC-BY?

Permissive licenses like MIT only require that you include the license text if you redistribute. CC licenses that have the BY part require that the original authors are attributed, but in flexible ...
35
votes
6answers
2k 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 ...
57
votes
3answers
3k views

How can I determine if two open source licenses are compatible with each other?

Given two open source projects, each with different licenses, are there metrics or resources I can use to determine if it is legitimate to copy code from one of the projects to the other?

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