When the LX reuse facility is enabled, each address space has a linkage first table and a linkage second table. The linkage index locates a specific entry in the linkage first table that in turn is used to locate a specific entry in the linkage second table. Otherwise, each address space has a linkage table. The linkage index locates a specific entry in the linkage table. For simplicity, subsequent discussion and diagrams will not make this distinction and will refer to the linkage table.