Programming Standardized Parameters 
Purpose
There are some parameters that can be created for various BAPIs because they contain the same or the equivalent data in all BAPIs. Such parameters are known as "standardized" parameters. They should be implemented the same in all BAPIs.
Process Flow
If your BAPI is a standardized BAPI, you should implement it following the programming guidelines described in the following sections.
See also:
Address Parameters Change Parameters Extension Parameters Return Parameters (Error Handling) Selection Parameters Test Run Parameters Text Transfer Parameters