I was looking at this license stuff yesterday.
Since verveineJ is based on JDT and JDT uses the EPL (Eclipse Public
License), VerveineJ could be required to use the EPL also ...
"According to article 1(b) of the EPL, additions to the original work
may be licensed independently, including under a commercial license,
provided such additions are "separate modules of software" and do not
constitute a derivative work. Changes and additions which do
constitute a derivative work must be licensed under the same terms and
conditions of the EPL, which includes the requirement to make source
"The EPL is approved by the Open Source Initiative (OSI) and listed as
a "free software license" by the Free Software Foundation (FSF)"
Nicolas Anquetil Univ. Lille1 / INRIA-equipe RMod