For multicard records only: To define the location of the merge sequence number in trailer cards, type:

When trailer card data is merged during a run with the merge facility, you might want trailer cards to be merged in a specific order, according to a sequence number entered as part of the data. The location of this sequence number can be defined with the keyword seq=cn for a single column code or seq=c(m,n) for a multicolumn code. For more information on merging data, see Merging data files.