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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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17 votes
4 answers
547 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 ...
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  • 6,655
14 votes
3 answers
2k 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 ...
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8 votes
2 answers
284 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 ...
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  • 183
5 votes
1 answer
363 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 ...
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  • 1,972
9 votes
2 answers
266 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 ...
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7 votes
2 answers
414 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,...
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  • 2,060
9 votes
1 answer
176 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"....
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  • 8,415
7 votes
2 answers
92 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 ...
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  • 6,655
22 votes
1 answer
5k 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 ...
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  • 1,972
7 votes
1 answer
64 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: ...
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12 votes
2 answers
126 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) ...
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8 votes
1 answer
268 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?...
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20 votes
2 answers
2k 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 ...
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  • 8,415
35 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 ...
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62 votes
3 answers
5k 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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