Congratulations to Mozilla on the release of the Mozilla Public License 2.0 after a two year versioning process. As Mozilla chair Mitchell Baker writes “Version 2.0 is similar in spirit to the previous versions, but shorter, better, and more compatible with other Free Software and Open Source Licenses.”

MPL 1.1 is one of the more popular free and open source software licenses, most famously used for Mozilla’s own Firefox browser. That MPL 2.0 is now compatible with the GPL, the most popular free and open source software license, is a big step forward for software. Why? Read Make Your Open Source Software GPL-Compatible. Or Else. which we link to in our FAQ explaining why CC licenses shouldn’t be used for software (except CC0). But the principle of lessening incompatibility among licenses is a general one, and applies to licenses used for cultural and scientific works, public sector information, databases, and more, as well as software. Thus one of our highlighted goals for version 4.0 of the CC license suite:

Interoperability – maximize interoperability between CC licenses and other licenses to reduce friction within the commons, promote standards and stem license proliferation;

This is a difficult goal, requiring long-term thinking and collaboration with other license stewards. We have a number of other goals for version 4.0 of the CC license suite as all; we hope the cumulative effect will make for a much better license suite than 3.0. Of course each license (e.g., BY-SA) will also remain similar in spirit. Shorter? We’ll see, balanced with everything else.

As the MPL 2.0 announcement notes, numerous people made valuable contributions to the development of that license. Possibly a first for a software license, even making the license look nice was addressed — something CC thinks is important, and another opportunity for people with different skills to help make licenses more useful. With a far greater diversity of projects using CC licenses, our need for community-wide feedback is even greater. We urge you to get involved in the CC 4.0 process.