-\Gls{MTASK}'s task language can be divided into three categories, namely
-\begin{enumerate*}
- \item Basic tasks, in most \gls{TOP} systems, the basic tasks are called editors, modelling the interactivity with the user.
+Tasks can be seen as trees that are the result of evaluating expressions.
+After evaluating an expression, the resulting task is executed.
+\todo[inline]{iets zeggen over values en dat hier ook een handwavy semantiek is.}
+The execution semantics of tasks is explained in more detail in \cref{chp:implementation}.
+The task language of \gls{MTASK} is divided into three categories, namely
+\begin{description}
+ \item [Basic tasks] are the leaves in the task trees.
+ In most \gls{TOP} systems, the basic tasks are called editors, modelling the interactivity with the user.