The topic describes the program-variable description.
Program Variable .-------------------. V (1) | >>-qualified-name---subscript------,subscript-------+----------><
The program variable must be enclosed in apostrophes if it contains special characters. Up to 132 characters can be specified for a program variable name. This includes any subscripts, embedded blanks, parentheses, and commas. It does not include the enclosing apostrophes when special characters are used. Some examples are:
COUNTA 'VAR1(2,3)' 'A.VAR1(I,3,A.J,1)' 'VAR1 OF A(I,3,J OF A)' '&LIBNAME'