This data record is used to change the structure number from which the directional coupled QTFs are to be copied. This structure number remains operative until another CSTR data record is input.
2 5 7 11 - --- -- ---- ----- |X| | |CSTR| | - --- -- ---- ----- | | | | | | | | | | | |_Structure number | | | | | |_Compulsory Card Header(A4) | | | |_Optional User Identifier(A2) | |_Compulsory END on Last card in deck(A3)