1st digit for school type, i.e for primary-1, secondary-2.
Next four digits in your case will be 0028
5th digit for teaching staff=1, for non-teaching staff=2.
That means if your school is secondary then, for teachers it will be- 200281, for non-teaching staffs it will be- 200282 and
if your school is primary then, for teachers it will be- 100281, for non-teaching staffs it will be- 100282
N.B- Last 5 digits remains blank for office use, you have to mention only the first 6 digits.