Code indicating the date format, time format, or date and time format.

Expression of a date, a time, or range of dates, times or dates and times.

Code indicating the sex of the individual.

Code defining the marital status of a person.

Code indicating the racial or ethnic background of a person; it is normally self-reported. Under certain circumstances this information is collected for United States Government statistical purposes.

Code indicating citizenship status.

Code identifying the country.

Code indicating the basis of verification