To define the correct destination structure, you must identify the required parameters.
In the example above, BAPI 1 for processing customers requires a table with the customer information. BAPI 2 requires a table with the city information.
Both parameters, the customer table and the city table, need to be part of the destination structure.
In this example, the destination structure must contain a table for the customers. The line type is defined by the data type of the processing function/BAPI parameter. In addition to the customer table, it must contain a second table for the cities. Again, the line type is defined by the data type of the processing function/BAPI parameter.