The <> reserved characters surround subscripts within dynamic arrays.
dyn.array.var< ac.exp{,vc.exp{,sc.exp}}> exp < exp
Assigns the value of variable name to attribute 1 in the dynamic array customer.item.
customer.item<1> = name
Inserts the literal 10 into a new value appended to the end of attribute 2 in the dynamic array item.
item<2,-1> = 10