3、 Wage type的种类：
Primary wage types： either entered into the system or generated by the system based on time data；
Secondary wage types：created by the payroll program during the payroll run；
Primary wage types are:
Dialog wage types
Time wage types
Others: Absences
Secondary wage types are: 以/开头
Valuation bases /0_ _
Cumulation of gross amount /1_ _
Bases for calculating average value /2_ _
Factoring/CO/8_ _
Outgoing wage types in retroactive period /A_ _
Incoming wage types from previous period /Z_ _
Others: TG Withholding /3_ , TX Withholding /4 _ _