used for the defining entry for the module, not every index reference.
% ==== 1. ====
% Choose one of the following section headers and index entries;
% \section{} generates the section header,
-% \bimodindex{} or \stmodundex{} generates an index entry for this module.
+% \bimodindex{} or \stmodindex{} generates an index entry for this
+% module. Note that these should only be used for the defining entry
+% for the module. Other references to the module should use
+% \refbimodindex{} or \refstmodindex{}.
% The \label{module-spam} line is for the \seealso{} command.
\section{Built-in Module \sectcode{spam}} % If implemented in C
% ==== 1. ====
% Choose one of the following section headers and index entries;
% \section{} generates the section header,
-% \bimodindex{} or \stmodundex{} generates an index entry for this module.
+% \bimodindex{} or \stmodindex{} generates an index entry for this
+% module. Note that these should only be used for the defining entry
+% for the module. Other references to the module should use
+% \refbimodindex{} or \refstmodindex{}.
% The \label{module-spam} line is for the \seealso{} command.
\section{Built-in Module \sectcode{spam}} % If implemented in C
% ==== 1. ====
% Choose one of the following section headers and index entries;
% \section{} generates the section header,
-% \bimodindex{} or \stmodundex{} generates an index entry for this module.
+% \bimodindex{} or \stmodindex{} generates an index entry for this
+% module. Note that these should only be used for the defining entry
+% for the module. Other references to the module should use
+% \refbimodindex{} or \refstmodindex{}.
% The \label{module-spam} line is for the \seealso{} command.
\section{Built-in Module \sectcode{spam}} % If implemented in C