SMITH is the first five letters of the last name. If less than five letters, an asterisk (*) is used in place of each missing letter.

P is the first name initial.

D is the middle name initial.

47 is the number you get if you subtract the year of birth from 100 (this person was born in 1953).

4 is a randomly assigned state filing number, and has nothing to do with birthdate.

L is a code for the month the person was born (see below).

C is a code for the date they were born  (see below).