A large module named PAYROLL, originally written in COBOL, contains
many sections. Two sections, FICA and STATETAX, were recompiled and
passed to the binder job step in the &&OBJECT data set. Then,
by including the &&OBJECT data set before the program module
PAYROLL (a member of the program library PROJECT.LIB001), the modified
sections automatically replace the identically named sections. See Figure 1.
Figure 1. Automatic
replacement of sections
The output module contains the modified FICA and STATETAX sections and the rest of the sections from the old PAYROLL module. The main entry point is INIT1, and the output module is placed in a library named PROJECT.LIB002. The COBOL automatic call library is used to resolve any external references that might be unresolved after the SYSLIN data sets are processed. The new module is named PAYROLL because PAYROLL is specified as the member name on the SYSLMOD DD statement and was not overidden by a NAME control statement.