The IXLLIST REQUEST=MONITOR_SUBLISTS request allows you to specify from 1 to 1024 sublists. To identify the sublists to be monitored, you build a record for each sublist in a buffer area, designated by BUFFER or BUFLIST on the macro invocation. The record is mapped by the IXLYMSRI macro and, for each sublist, contains the same information that you would have provided for a single request — the list number, the entry key, and any user notification control information.