Add extra.

chapters/synchronous.tex

@@ -885,6 +885,7 @@ \section{Clock Partitioning}\label{clock-partitioning}
 \begin{nonnormative}
 The clock partitions are solely determined by the equations.
 Thus two different clock partitions can have clocks defined by the same expressions.
+It is a quality of implementation issue that such partitions are executed synchronously, e.g., by putting them in the same task in a real-time simulation context.
 \end{nonnormative}
 
 \subsection{Flattening of Model}\label{flattening-of-model}