Assume that you have a special version of the assembler supporting two additional operation codes, LOOP and ENDLOOP, and that the following JCLIN is to be processed:

//JOB      JOB 'accounting info',MSGLEVEL=(1,1)
//STEP     EXEC PGM=MYASM
//SYSPUNCH DD DSN=&&PUNCH(NEWMOD),;
//         SPACE=(TRK,(1,1,1)),DISP=(,PASS)
//SYSIN    DD *
NEWMOD     CSECT
           .
           .
LOOPSTRT   LOOP
           .
           .
LOOPEND    ENDLOOP
           .
           .
           END NEWMOD

To process this correctly and have SMP/E recognize that LOOP and ENDLOOP are opcodes, you should set up the following OPCODE member (in this case, named SMPPRM01):

KEY=LOOP    TYPE=OPCODE.
KEY=ENDLOOP TYPE=OPCODE.

The command to execute the JCLIN should then be as follows:

SET      BDY(XYZTST1)       /* Process zone XYZTST1.    */.
JCLIN    ASM(MYASM)         /* Special assembler.       */
         OPCODE(SMPPRM01)   /* Special opcode list.     */.