Wage Type Processing with the Toolbox 
Use
In payroll,
wage types are important stores of information which are used to calculate wages and salaries. The wage type is particularly important in the Interface Toolbox, which was developed to export payroll results from the Human Resources (HR) component to a third-party system.Special, enhanced processing rules apply for particular functions in the Interface Toolbox to meet the demands made on the wage types. These processing rules differ from the processing rules for individual functions. This concerns the following functions:
Wage Types in Change Validation

The same processing rules apply to wage types as to other objects for all functions in the interface format or change validation that are not specifically mentioned here (for example, the conversion function for field objects, and so on)