\label{Script_Variables}


\begin{itemize}
\item \$external::target - set to the current target the xml parser is parsing
for 
\item \$external::part - set to the \emph{id} of the current problem $<$part$>$;
zero if there are no $<$part$>$
\item \$external::gradestatus - set to the value of the current resource.partid.solved
value 
\item \$external::datestatus - set to the current status of the clock either
CLOSED, CAN\_ANSWER, CANNOT\_ANSWER, SHOW\_ANSWER, or UNCHECKEDOUT 
\item \$external::randomseed - set to the number that was used to seed the
random number generator 
\item \$pi - set to PI 
\item \$rad2deg - converts radians to degrees 
\item \$deg2rad - converts degrees to radians
\end{itemize}