Example

* Before calling IWMESTRT initialize classification
* attributes in CLFSY
*
        IWMESTRT ETOKEN=ENCTKN,CLSFY=CLFSY,
                 WORKREQ_HDL=WRHANDLE,ARRIVALTIME=ATIME
*
* Storage areas
*
        IWM4CLSY PLISTVER=MAX,MF=(L,CLFSY,0D)
ENCTKN   DS    CL8             Enclave token
ATIME    DS    CL8             Arrival time
WRHANDLE DS    CL8             Work Request Handle