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DDL (from SQL) supports constraints. DDS does not support constraints.
However, you can add a constraint to either file after the fact with
ADDPFCST.
Create two files, let's say, ORDHEAD and ORDLINE. Have a field with the
same properties in both file. You could call it ORDERNUM or if you like
obscure meaningless names you could call it ORDHEADN in one file and
ORDLINEN in the other file. Then you could
ADDPFCST FILE(ORDLINE) TYPE(*REFCST) KEY(ORDLINEN) PRNFILE(ORDHEAD)
PRNKEY(ORDHEADN)
Multimember files are forbidden. There is a workaround but I really doubt
you have the not free option to do that and I really doubt you have a
field in your file that will act as the member name instead. (They're
called "partitioned tables".)
Rob Berendt
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