numeric-fixed: only numbers, no decimal point, no negative numbers
numeric-fixed-positive: only numbers, no decimal point, only positive numbers
numeric-free: numbers, decimal point, negative numbers
numeric-free-positive: numbers, decimal point, only positive numbers
alpha-numeric: numbers, letters, special characters
numeric-fixed: only numbers, no decimal point, no negative numbers numeric-fixed-positive: only numbers, no decimal point, only positive numbers numeric-free: numbers, decimal point, negative numbers numeric-free-positive: numbers, decimal point, only positive numbers alpha-numeric: numbers, letters, special characters