Person type
Person Type being a special field, is stored in the database as string of numbers 0,1,2,3,4,5,6,7,8,9 where each digit matches a particular type.
The value in the database is a string containing the number for selected person types and a space for the non-selected person types.
Example
For a person with person type 2, 5 and 9 the value will be:
<space>2<space><space>5<space><space><space>9<space>
