This is a text description of Figure 9-5, "Executing DB2/400 Stored Procedures".
The functions illustrated in the figure are described in the surrounding text, section "Executing DB2/400 Stored Procedures from Applications".
This is a simplified view of running a DB2 stored procedure on an Oracle application by calling the stored procedure through the gateway from DB2/400.
The application calls the "emproc" stored procedure from an Oracle9i instance, which uses the gateway (TG4DB2/400) to call the stored procedure from DB2/400.
In this example, "emproc" is a DB2/MVS stored procedure.