Avoid hard coded numbers.

chapters/annotations.tex

@@ -1479,7 +1479,7 @@ \subsection{Connector Sizing}\label{connector-sizing}
 connectors, it is automatically updated according to the following
 rules:
 \begin{enumerate}
-\item
+\item \label{connectorSizing:addVector}
   If a new connection line is drawn between one outside and one
   inside vector of connectors both dimensioned with (\lstinline!connectorSizing!)
   parameters, a connection between the two vectors is performed and the
@@ -1501,21 +1501,21 @@ \subsection{Connector Sizing}\label{connector-sizing}
 equation
   connect(inPorts, step1.inPorts); // new connect equation
 \end{lstlisting}
-\item
+\item \label{connectorSizing:deleteVector}
   If a connection line is deleted between one outside and one
   inside vector of connectors both dimensioned with (\lstinline!connectorSizing!)
   parameters, the connect equation is removed and the (\lstinline!connectorSizing!)
   parameter of the component is set to zero or the modifier is removed.
-  \emph{Example:} Assume the connection line in (3) is removed.
+  \emph{Example:} Assume the connection line in the resulting example in case~\ref{connectorSizing:addVector} is removed.
   This results in:
 \begin{lstlisting}[language=modelica]
 parameter Integer nIn=0 annotation(Dialog(connectorSizing=true));
 Step_in inPorts[nIn];
 Step step1; // modifier nIn=nIn is removed
 \end{lstlisting}
-\item
+\item \label{connectorSizing:addScalar}
   If a new connection line is drawn to an inside connector with
-  \lstinline!connectorSizing! and case 1 does not apply then, the parameter is
+  \lstinline!connectorSizing! and case~\ref{connectorSizing:addVector} does not apply then, the parameter is
   incremented by one and the connection is performed for the new highest
   index. \emph{Example:} Assume that 3 connections are present and a new
   connection is performed. The result is:
@@ -1530,9 +1530,9 @@ \subsection{Connector Sizing}\label{connector-sizing}
   not sufficient to only provide a mechanism to always connect to the
   last index. Instead, some mechanism to select an index conveniently
   should be provided.
-\item
+\item \label{connectorSizing:deleteScalar}
   If a connection line is deleted to an inside connector with
-  \lstinline!connectorSizing! and case 2 does not apply then, then the
+  \lstinline!connectorSizing! and case~\ref{connectorSizing:deleteVector} does not apply then, then the
   (\lstinline!connectorSizing!) parameter is decremented by one and all connections
   with index above the deleted connection index are also decremented by
   one. \emph{Example:}Assume there are 4 connections: