Social Security Number If element 'Othr/Id/SchmeNm/Cd' value is SOSE then 'Othr/Id' value must be a valid social security number. Format "^(0[1-9]|[12]\d|3[01])(0[1-9]|1[0-2])([5-9]\d+|\d\d-|[01]\dA)\d{3}[\dA-Z]$").