\label{Authoring_Hint_Tags} All of these tags must appear inside a \textbf{}response tag: \begin{itemize} \item \textbf{hintgroup}\index{hintgroup}: tag that surrounds all of a hint. \item \textbf{hintpart}\index{hintpart}: required. Tag to implement conditional hints. It has a required argument \textbf{on}. When a hint tag named the same as the \textbf{on} attribute evaluates to be correct, the \textbf{hintpart} will show. If no other \textbf{hintpart} is to show then all hintparts with an \textbf{on} value set to {}``\textbf{default}'' will show. \item \textbf{numericalhint}\index{numericalhint}: It has all the arguments that \textbf{numericalresponse} does, and the required attribute \textbf{name} which should be set to the value of which \textbf{hintpart} will be shown. \item \textbf{stringhint}\index{stringhint}: It has all the arguments that \textbf{stringresponse} does, and the required attribute \textbf{name} which should be set to the value of which hintpart will be shown. \item \textbf{formulahint}\index{formulahint}: It has all the arguments that \textbf{formularesponse} does, and the required attribute \textbf{name} which should be set to the value of which hintpart will be shown. \item \textbf{optionhint}\index{optionhint}: The required attribute \textbf{name} should be set to the value of which \textbf{hintpart} will be shown. \item \textbf{radiobuttonhint}\index{radiobuttonhint}: The required attribute \textbf{name} should be set to the value of which \textbf{hintpart} will be shown, and the attribute \textbf{answer} should be a two element list, first the type (\textbf{foil} or \textbf{concept}) and then either the foil's name or the concept's string. \end{itemize}