This copy step informs SMP/E that an entire distribution library has been copied to an operating system library. From the INDD operand, SMP/E determines the ddname of the distribution library and creates a target zone DLIB entry named AMACLIB. From the OUTDD operand, SMP/E determines the ddname of the operating system library and adds a SYSLIB subentry, MACLIB, to the DLIB entry. SMP/E uses this entry to determine the operating system library for subsequent modifications that specify an element's DISTLIB as AMACLIB.