The Snowball stemmers (snowball.jar) are available under the following
license (http://snowball.tartarus.org/license.php):

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All the software given out on this Snowball site is covered by the BSD
License (see http://www.opensource.org/licenses/bsd-license.html ), with
Copyright (c) 2001, Dr Martin Porter, and (for the Java developments)
Copyright (c) 2002, Richard Boulton.

Essentially, all this means is that you can do what you like with the
code, except claim another Copyright for it, or claim that it is issued
under a different license. The software is also issued without
warranties, which means that if anyone suffers through its use, they
cannot come back and sue you. You also have to alert anyone to whom you
give the Snowball software to the fact that it is covered by the BSD
license.

We have not bothered to insert the licensing arrangement into the text
of the Snowball software.
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Everything else in this package is Copyright (c) 2006-2007 Kurt Hornik
and available under the same modified BSD license as above.
