Examples

```
DYNALLOC....
DYNALLOC....
*
INCLUDE,MEMBER=JSAM          Include JSAM related statements
*
INCLUDE,MEMBER=MAINS         Include main processor information
*
INCLUDE,MEMBER=GMS           Include job classes, groups, select modes
*
.
.
.
INCLUDE,MEMBER=UR            Include unit record devices
*
INCLUDE,MEMBER=TAPE          Include tape devices
*
INCLUDE,MEMBER=DASD          Include direct access devices
*
ENDINISH
```
Although you will typically not use the INCLUDE statement in the member you specify on the *MODIFY,CONFIG command, segmented initialization streams are useful when used in conjunction with *MODIFY,CONFIG processing. For example, suppose all the RJPWS statements are in a member "RJPWS" of a PDS. And suppose your IATUX15 supports conditional logic. For example IATUX15 is set up to interrogate the parameter string that is passes and skip over certain initialization statements depending on the parameter value. To add new RJPWS statements to the initialization stream, all that would have to be done is the following:
- Add the new RJPWS definitions to the existing "RJPWS" member.
- Add conditional logic in the RJPWS member to just process the new statements when a *MODIFY,CONFIG command is issued. For example:
```
*IF PARM.(1,3) = NEW NEWSTUFF   Skip over old definitions if *F,CONFIG

** old RJPWS definitions **

RJPWS,.....
RJPWS,.....
RJPWS,.....
RJPWS,.....
RJPWS,.....

*LBL NEWSTUFF
** new RJPWS definitions **

RJPWS,.....
RJPWS,.....
 
```
- Issue the following *MODIFY,CONFIG command:
```
*MODIFY,CONFIG,ADD=RJPWS,P=NEW
 
```
  As a result of specifying "P=NEW" the old RJPWS definitions will be skipped and only the new RJPWS definitions will be processed.

If a spool is being added via the *MODIFY CONFIG command, the standard rule for adding statements does not apply. Instead, the specified member must include all previously defined TRACK and FORMAT statements. All DYNALLOC statements should also be included, to simplify spool definition setup. JES3 will determine the spool extents that are being added, if any, and the same member will be used the next time the initialization stream is read.

In the following example, the installation uses one spool volume, SPOOL1, whose DD statement is already included in the JES3 start procedure. The INCLUDE member (for example, JSAM) contains the following statements:

DYNALLOC,DDN=IATPLBI1,DSN=SYS1.PROCLIB    
DYNALLOC,DDN=IATPLBI1,DSN=SYS1.PROCLIB.INSTALL  
*     
* STARTED UP TASK CONTROL PROCLIBS  
*    
DYNALLOC,DDN=IATPLBS1,DSN=SYS1.PROCLIB  
DYNALLOC,DDN=IATPLBS1,DSN=SYS1.PROCLIB.INSTALL  
*      
* TSO USER LOGON PROCLIBS   
*     
DYNALLOC,DDN=IATPLBT1,DSN=SYS1.PROCLIB  
DYNALLOC,DDN=IATPLBT1,DSN=SYS1.PROCLIB.INSTALL  
*  
TRACK,DDNAME=SPOOL1,SPART=PART1   
*  
SPART,NAME=PART1,DEF=YES,INIT=YES   
*  
BUFFER,SPLIM=(3,5),PAGES=500,GRPSZ=12,BUFSIZE=4084 
*    
OPTIONS,WANTDUMP=YES,DUMP=PRDMP,JOBNO=(1,32767,32767),MT=ON   
*     
ENDJSAM

To add a new spool, SPOOL2, update the JSAM member as follows:

DYNALLOC,DDN=IATPLBI1,DSN=SYS1.PROCLIB 
DYNALLOC,DDN=IATPLBI1,DSN=SYS1.PROCLIB.INSTALL  
*        
* STARTED UP TASK CONTROL PROCLIBS  
*            
DYNALLOC,DDN=IATPLBS1,DSN=SYS1.PROCLIB  
DYNALLOC,DDN=IATPLBS1,DSN=SYS1.PROCLIB.INSTALL 
*        
* TSO USER LOGON PROCLIBS  
*          
DYNALLOC,DDN=IATPLBT1,DSN=SYS1.PROCLIB  
DYNALLOC,DDN=IATPLBT1,DSN=SYS1.PROCLIB.INSTALL

The following two statements are added:

Note: Although the statements will work as shown, you should keep all TRACK/FORMAT statements in order. In this example, TRACK for SPOOL2 would follow TRACK for SPOOL1.

DYNALLOC,DDN=SPOOL2,DSN=SYS1.JES3SPL  
TRACK,DDNAME=SPOOL2,SPART=PART1  
*         
TRACK,DDNAME=SPOOL1,SPART=PART1   
*                  
SPART,NAME=PART1,DEF=YES,INIT=YES  
*                  
BUFFER,SPLIM=(3,5),PAGES=500,GRPSZ=12,BUFSIZE=4084   
*            
OPTIONS,WANTDUMP=YES,DUMP=PRDMP,JOBNO=(1,32767,32767),MT=ON 
*     
ENDJSAM