Rules for modifying DD statements in concatenated data sets
- To override the first DD statement in a concatenation, code only
one overriding DD statement.
- To override any following DD statements in the concatenation,
code an overriding DD statement for each concatenated DD statement.
- The overriding DD statements must be in the same order as the
concatenated DD statements.
- Code a ddname on only the first overriding DD statement. Leave
the ddname field blank on the following statements.
- To leave a concatenated statement unchanged, code its corresponding
overriding DD statement with a blank operand (or parameter) field.