Plone License FAQ  by Alex Limi last modified Oct 28, 2011 05:35
PM Contributors: Joel Burton, Alexander Limi, Jon Stahl This
documents answers some common questions about Plone, its
licensing policy, and how the GPL works. The contributor’s
agreement and the GPL license itself are still the authoritative
sources (i.e: anything we write here is not overriding those
documents), but this is a useful document to read if you have
questions about Plone and its license, and you don't feel like
reading legal documents to find the answers to some simple
questions.  These are some of the questions we have received. If
you have additional questions, feel free to send a mail to with
your question.  What is the GPL?  The GPL (GNU Public License)
is the license that Plone is distributed under, and it governs
what you can and can't do with the Plone code. Very shortly
summarized, it says that you have to release any changes you
make to the code base back to the Plone community if you are
redistributing Plone. There are a n