FSAB - Secondary key task control block Name : DCLFSAB Function: This segment declares the secondary key task control block structure. Offsets Dec Hex Type Len Name (Dim) Description 0 (0) STRUCTURE 37 FSAB SECONDARY KEYS CLASS 0 (0) CHARACTER 10 SABOPRTK OPERATION TOKEN 0 (0) CHARACTER 8 SABOCCTK OCCURRENCE TOKEN 8 (8) SIGNED 2 SABOPRNR OPERATION NUMBER 10 (A) CHARACTER 27 SABRESRV RESERVED CHARS