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Permissive and Copyleft Are Not Antonyms



Using the term “permissive” as an antonym to “copyleft” – or “restrictive” as its synonym – are unhelpful framing. Describe license reciprocity instead.

Some open source licenses implement a clever hack invented by Richard Stallman where, as a condition of the copyright license, anyone creating derived versions has to agree they will license the new version the same way as the original. In a play on words, this concept is called “copyleft” and many open source licenses implement this hack.

OSI extends support to OW2 as Associate Organization.



OW2, the global community for open source infrastructure software and application platforms, and the Open Source Initiative (OSI), the global steward of the Open Source Definition, announced at OW2con’17 that OSI has extended our support to OW2 as an associate member.

While both the OSI and OW2 have been working for yeas to promote software freedom, extending the partnership between the two organizations now, signifies several recent developments in shared initiatives:

React to React

The OSI has received several inquiries concerning its opinion on the licensing of React [1], which is essentially the 3-clause BSD license along with, in a separate file, an 'Additional Grant of Patent Rights' [2].

Software Freedom Advocates Invited to the Open Source Initiative's Community Social

OSI hosting a community social for the open source software community: join us for drinks, dinning and discussions.

Meadhall, Cambridge, MA April 04, 2017 -- If you're in the greater Boston, Massachusetts area on Tuesday, April 4th, the OSI Board of Directors invites you to join us and the free and open source software community for a casual evening get-together (Oh, and please feel free to bring a friend).

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