The front-end of the BRMS destined for Drools 5 appears to use the GWT-EXT library, which in turn requires the Ext JS library. However, one of my colleagues has pointed out that as of April 21st 2008, the EXT JS library is now licensed under GPL (v3), whereas prior to this it was licensed under LGPL.

 

I don't know too much about licensing, but isn't this going to have an impact on the final Drools 5.0 licensing? From the little I know about licensing, if you use a GPL library (ext-core.js etc in the BRMS) then any derived code (e.g.. Drools) can only be distributed under GPL as well, so Drools couldn't be distributed under Apache 2 anymore?

 

Its a bit bonkers of EXT JS to suddenly change a license from LGPL to GPL and there is definitely a "heated" debate going on in the GWT-EXT and other forums. I hope it's appropriate to post this on the dev list, and apologies if not.

 

Regards

Shahad