Format: environment variable for QSAM files, DSN option 1 DSN(data-set-name 2? (member-name) 3 ) 4? 4 NEW 4 OLD 4 SHR 4 MOD 5? 5 TRACKS 5 CYL 6? SPACE(nnn,mmmm) 7? VOL(volume-serial) 8? UNIT(type) 9? 9 KEEP 9 DELETE 9 CATALOG 9 UNCATALOG 10? STORCLAS(storage-class) 11? MGMTCLAS(management-class) 12? DATACLAS(data-class)