The Employee Date Specifications business object contains date types that can be assigned to an employee.
Information about the date specifications is stored in the Date Specifications
infotype (0041) in Personnel Administration.
The following date types are among those that can be assigned to an employee:
Technical entry date
Technical entry date SPF
The inherited business object is Employee Information Differentiated by Type (EMPLOYEEIT)
The technical entry date determines the date as of which the employee should be technically taken into account in the system.