The IXLLSTE service enables you to atomically operate on individual list entries in a list structure. Some functions of IXLLSTE require that the structure be allocated in a coupling facility of CFLEVEL=9 or higher. The following services are available for operating on individual list entries:

• Create a new list entry, either by reading it from your storage area or by moving it from an existing list in the structure.
• Read a list entry into your storage area.
• Write a list entry from your storage area to a list structure.
• Move a list entry from one list to another, which may result in the creation of a new list entry.
• Delete a list entry from a list.

The IXLLSTE macro provides list services equivalent to the following IXLLIST request types:

• IXLLIST REQUEST=READ
• IXLLIST REQUEST=WRITE
• IXLLIST REQUEST=MOVE
• IXLLIST REQUEST=DELETE

List structures allocated in a coupling facility of CFLEVEL=9 or higher can be allocated with certain attributes not available in a lower level coupling facility.

• Users can assign a user-designated entry identifier to a newly created list entry, rather than having the system assign the entry identifier.
• Secondary keys can be specified, thus allowing the user to reference a keyed list entry by entry key, secondary key, or both.