You can define as many Extra Information Types as you require to hold additional information about people. There are also predefined Extra Information Types called:
Military Service Information - stores the start and end date of a person's period of military service.
Residence Permit - stores administrative information such as the status, validity dates, permit number, and issuing authority for a person's residence permit.
Work Permit - stores administrative information such as the status, validity dates, permit number, and issuing authority for a person's work permit.
Child Auto Sequence Generation Indicator - controls whether the child sequence numbers for the person are generated automatically or entered manually.
Child Details - stores additional information on a person's children. The Extra Information Type stores information on the child's employment status, whether employed abroad, and the child's income. This information used in the formula for generating the child sequence numbers.
Spouse Details - stores additional information on a person's spouse. The Extra Information Type stores information on the spouse's employer, type of employment, location (region) of employment, and number of working hours. This information is used in the formula for calculating the local cost of living allowance.
Period of Employment - stores a correcting factor for the length of service calculation. You add this correcting factor to the length of service.