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+\section{Optik license}
+\label{optikLicense}
+
+The optik package (Cheetah.Utils.optik) is based on Optik 1.3,
+\url{http://optik.sourceforge.net/}, \copyright 2001 Gregory P Ward
+$<$gward@python.net$>$.  It's unmodified from the original version except
+the \code{import} statements, which have been adjusted to make them work in
+this location.  The following license applies to optik:
+
+\begin{quotation}
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+\begin{itemize}
+\item Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+  
+\item Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+\item Neither the name of the author nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+\end{itemize}
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+\end{quotation}
+
+% Local Variables:
+% TeX-master: "users_guide"
+% End: