License

GWT-Ext License Information

The GWT-Ext software and sample code is licensed under the GNU Lesser General Public Licence (LGPL), v 3.0.

The GWT-Ext LGPL license applies only to use of GWT-Ext with Ext versions 2.0.2 or lower. GWT-Ext does not support Ext version 2.1 or greater and use of GWT-Ext with Ext versions 2.1 or greater will void the GWT-Ext license.


Copyright (C) 2007-2008 GWT-Ext LLC. GWT-Ext is licensed under the LGPL v3.0 which is sufficiently flexible to allow use of GWT-Ext in both open source and commercial projects.

Using GWT-Ext (by importing GWT-Ext’s classes and interfaces in your Java code), and extending GWT-Ext (by subclassing or implementation of an extension interface) is considered by the authors of GWT-Ext to be dynamic linking. Hence our interpretation of the LGPL is that the use of the unmodified GWT-Ext source does not affect the license of your application code. Additionally the authors of GWT-Ext do not consider the output of compiling your application that uses GWT-Ext using JDK and / or the GWT compiler as derivative work of GWT-Ext.

The use of the unmodified GWT-Ext binary never affects the license of your application or distribution. If you need to modify GWT-Ext explicit permission is required.


This clarification has been added as there’s been some ambiguity on the use of GWT and LGPL libraries and I wanted to ensure that users feel comfortable using GWT-Ext without fearing that they may be violating the license.

Inquiries about commercial license options can be sent to licensing@gwt-ext.com

Source code for software included in this distribution is available from the GWT-Ext project (http://www.gwt-ext.com/) or as otherwise indicated at the bottom of this page.

LICENSE INFORMATION REGARDING RELATED THIRD-PARTY SOFTWARE

The GWT-Ext library relies on the following third party software. Below is the location and license information :

Package License Details
Google Web Toolkit Apache License v. 2.0 http://code.google.com/webtoolkit/
Ext 2.0.2 Ext is not bundled with GWT-Ext. Ext 2.0.2 has several licensing options available to fit a variety of needs. LGPL 3.0 is one of them. The license can be found in the Ext 2.0.2 distributable. Ext version 2.0.2 can be downloaded from here
YUI BSD. http://developer.yahoo.com/yui/
Mapstraction BSD http://www.mapstraction.com/
PageBus BSD http://www.tibco.com/devnet/pagebus/default.jsp