--- loncom/html/adm/help/tex/Authoring_Responseparam_Parameter.tex	2005/02/22 15:05:14	1.2
+++ loncom/html/adm/help/tex/Authoring_Responseparam_Parameter.tex	2016/12/02 15:29:19	1.3
@@ -14,7 +14,9 @@ for the parameter.
 the parameter. 
 \item \textbf{type}\index{type}: required. Specifies the type of parameter:
 \textbf{tolerance}, \textbf{int}, \textbf{float}, \textbf{string},
-or \textbf{date}.
+or \textbf{date}. Additional constraints for the type can be specified by
+adding an underscore and the constraint name to the type, for instance
+\texttt{int\_pos} means \textit{strictly positive integer}.
 \item \textbf{description}\index{description}: string describing the
 parameter. This is what is used to talk about a parameter outside
 of a problem.