\begin{isabelle}%%\begin{isamarkuptext}%\noindentThe type \isaindexbold{nat} of natural numbers is predefined andbehaves like%\end{isamarkuptext}%\isacommand{datatype}~nat~=~{"}0{"}~|~Suc~nat\end{isabelle}%%%% Local Variables:%%% mode: latex%%% TeX-master: "root"%%% End: