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\title{Opensource-Licenses}
\maketitle

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\subsection{Opensource-Licenses}

\subsubsection{GPL}
\begin{frame}
\frametitle{GPL: GNU \textbf{G}eneral \textbf{P}ublic \textbf{L}icense}
You are allowed to:
\begin{itemize}
\item Use the source code
\item Change the source code
\item (Re-)Distribute the source code
\end{itemize}
You have to:
\begin{itemize}
\item Provide your code under the same license!!
\end{itemize}
\end{frame}

\begin{frame}
\frametitle{GPLv2 vs. GPLv3}
\begin{alertblock}{What's different in GPLv3?}
\begin{itemize}
\item It covers DRM
\item Wants to prevent ''Tivoization''
\item Wants to protect against patent treats
\item Clarifies license compatibility
\item System Libraries Exception has been adjusted
\end{itemize}
\end{alertblock}
\end{frame}

\begin{frame}
\frametitle{Copyleft}
\begin{alertblock}{http://www.gnu.org/copyleft/}
''Copyleft is a general method for making a program (or other work) free, and
requiring all modified and extended versions of the program to be free as
well.''
\end{alertblock}
\end{frame}

\begin{frame}
\frametitle{LGPL: \textbf{L}esser \textbf{GPL}}
\begin{itemize}
\item Pretty much the same as GPL, but:
\item any software that is just linked against this code can be released under
its own license
\end{itemize}
\end{frame}

\subsubsection{Apache, BSD}
\begin{frame}
\frametitle{Apache License}
You are allowed to:
\begin{itemize}
\item Use the code
\item Modify the code
\end{itemize}
as long as you:
\begin{itemize}
\item Include an appropriate attribution in the documentation
\end{itemize}
\end{frame}

\begin{frame}
\frametitle{BSD}
You are allowed to:
\begin{itemize}
\item Use the code
\item Modify the code
\item (Re-) Distribute the code
\item Keep it Closed-Source
\item Release it under you own license
\end{itemize}
You have to:
\begin{itemize}
\item Keep and distribute the original copyright statements!
\item Mention the ''University of California, Berkeley'' in the documentation
/ advertising (''advertising clause'')
\end{itemize}
\end{frame}

\begin{frame}
\frametitle{BSD: Modified BSD license}
\begin{itemize}
\item AKA 3-clause BSD license
\item Identical to the ''original'' BSD license (4-clause BSD license), but
without the ''advertising clause''
\end{itemize}
\end{frame}

\begin{frame}
\frametitle{License compatibility}
\begin{itemize}
\item Be careful when mixing code which is released under different licenses!
\item Check if the licenses are compatible!
\end{itemize}
Example:
\begin{itemize}
\item BSD is incompatible with GPL, because:
\item of BSDs ''advertising clause''
\item BSD doesn't contain any Copyleft
\end{itemize}
This means:
\begin{itemize}
\item You can only use 3-clause BSD code in GPL code!
\item You MUST NOT use GPL code in BSD code!!!!
\end{itemize}

\end{frame}

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