//SMSDS6  DD  DSNAME=MYDS6.PGM,LIKE=MYDSCAT.PGM,DISP=(NEW,KEEP)

In the example, the data set attributes used for MYDS6.PGM are obtained from the cataloged model data set MYDSCAT.PGM.

//SMSDS7  DD  DSNAME=MYDS7.PGM,LIKE=MYDSCAT.PGM,DISP=(NEW,KEEP),
//          LRECL=1024

In the example, the data set attributes used for MYDS7.PGM are obtained from the cataloged model data set MYDSCAT.PGM. Also, the logical record length of 1024 overrides the logical record length obtained from the model data set.