Hi, All the neo4j official drivers are under the Apache 2.0 license, so they can be used with an MIT project, there is no problem on that.
About the database itself, there are two editions : * Community under the GPLv3 * Enterprise under a commercial license And you can use Neo4j in two modes : * As a server * Or embedded in your code (for java application) The GPL license is viral when you are using the embedded mode of Neo4j, because your code needs to be compliant with the GPL. But it's not the case when you are using the server mode. For a remote use with Apache v2 driver, there is really no problem (in fact that's why the drivers are using the apache license). There is a separation between the license of your application code (+ the drivers), and the license of the remote database server. So you can use Neo4j (community or enterprise) in server mode for your MIT project without any risk (for example, mysql community is also under a GPL license). But if you modify neo4j's code in the community edition, you have to put the code in GPL. The only point you need to be focus on, is the *distribution* of your application. And I have a last point to do about open-source, the GPL license is made by the Free Software Fundation, so GPL is free software. It respects the freedom to use, copy, study, modify the code (with a redistribution of the modifications) . Hope it helps. Cheers Le dimanche 15 janvier 2012 10:22:10 UTC+1, Harald Wellmann a écrit : > > True or false: copyleft is contagious, so if library A uses library B > which is GPLed, and if library A is distributed, then library A must > also be licensed under GPL. > > If this is true, then how can Spring Data Neo4j be published under an > Apache License, whereas Neo4j is published under GPL? > > If this is false, does that mean I can write a software component using > Neo4j and publish it under an Apache License? > > Best regards, > Harald > > -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to neo4j+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/neo4j/e6f23a10-7476-4e06-92d4-57dcf2ae6701%40googlegroups.com.
