Rewrite with reference to component-reference in the grammar

chapters/annotations.tex

@@ -1069,18 +1069,19 @@ \subsubsection{Text}\label{text}
 \item
   \%class replaced by the name of the class (only the last part of the hierarchical name).
 \item
-  \%\emph{par} and \%\{\emph{par\}} replaced by the value of the parameter \lstinline!par!.
+  \%\emph{par} and \%\{\emph{par}\} replaced by the value of the parameter \lstinline!par!.
   If the value is numeric, tools shall display the value with \lstinline!displayUnit!, formatted according to the BIPM specification.
   E.g., for
 \begin{lstlisting}[language=modelica]
 parameter Real t(unit = "s", displayUnit = "ms") = 0.1
 \end{lstlisting}
   tools shall display \emph{100 ms}.
-  The intent is that the text is easily readable, thus if \lstinline!par! is of an enumeration type, replace \lstinline!%par! by the item name, not by the full name.
+  The intent is that the text is easily readable, thus if \lstinline!par! is of an enumeration type, replace \%\emph{par} by the item name, not by the full name.
   \begin{example}
-  If \lstinline!par = "Modelica.Blocks.Types.Enumeration.Periodic"!, then \lstinline!%par! should be displayed as \emph{Periodic}.
+  If \lstinline!par = "Modelica.Blocks.Types.Enumeration.Periodic"!, then \%\emph{par} should be displayed as \emph{Periodic}.
   \end{example}
-  The form \%\{\emph{par\}} allows component references and is required for quoted identifiers, and can be directly followed by a letter.
+  When quoted identifiers are involved, the form \%\{\emph{par}\} must be used.
+  Here, \emph{par} is a general \lstinline[language=grammar]!component-reference!, and the macro can be directly followed by a letter.
   Thus \lstinline!%{w}x%{h}! gives the value of \lstinline!w! directly followed by \emph{x} and the value of \lstinline!h!, while \lstinline!%wxh! gives the value of the parameter \lstinline!wxh!.
   If the parameter does not exist it is an error.
 \end{itemize}