
   Syntax       label %:= DERIVATIVE%{%(%&n&%)%} label

   Purpose      Isolates the &n&th derivative.  If &n& is omitted then
                the first derivative is isolated.

   Abbreviation         DERIV for DERIVATIVE

   %Example%

   þE : a*b*%D%[x](f(x)) + 4
   þF := DERIVATIVE E
   F : %D%[x](f(x))

   PROCEDURE Example(LABEL L, M) ;
     M := DERIVATIVE L ;
   EXIT

