The target library for macros, source, data elements, hierarchical file system elements, and program elements is found as a SYSLIB subentry for an element entry in the target zone. If no SYSLIB subentry is present and no SYSLIB is specified on the element's MCS, a check is made to determine whether the element's distribution library has been totally copied to a target library. If it has (as shown by the presence of a target zone DLIB entry for the distribution library), the target library to which the DLIB was copied is determined to be the target library for the element.