If the XREF option is specified on the EXEC statement, a cross-reference table is produced. The cross-reference table consists of a module map and a list of cross-references for each control section. Each address constant that refers to a symbol defined in another control section is listed with its assigned location, the symbol referred to, and the name of the control section in which the symbol is defined. When control sections are compiled together, and simple address constants are used to refer from one control section to another (instead of using external symbols and entry names), the control section name is listed as the symbol referred to.

For overlay programs, this information is provided for each segment; the number of the segment in which the symbol is defined is also provided.

If a symbol is unresolved after processing by the linkage editor, it is identified by $UNRESOLVED in the list. However, if an unresolved symbol is marked by the never-call function (as specified on a LIBRARY control statement), it is identified by $NEVER-CALL. If an unresolved symbol is a weak external reference, it is identified by $UNRESOLVED(W).

Figure 1 includes a cross-reference table of the address constants in program ABC00.