9、常见的function：
Functions that import infotype data:
WPBP ：Work center and basic pay data
RAB ：Absences
P0015 ：Additional payments
P2010 ：EE remuneration information
Functions that process data according to the entries in customizing tables:
PAB ：Absence valuation
Functions that edit wage types using personnel calculation rules:
PIT ：Process input table
按F1键可显示function的文档说明；