Using spool files for printer output on z/OS® CICS®

If the printer file is associated with the spool file type at generation, the system resource name (systemName property) identifies the node, user or external writer identifier, and class that you want to spool the file.

The name is in the following format:
nodeid.userid.class
nodeid
A 1- to 8-character system node ID.
userid
A 1- to 8-character system user ID.
class
A 1-character spool class.
You can specify an asterisk to use the default userid and nodeid. The class component is optional and defaults to "A". If you do not specify class, userid is also optional and defaults to the CICS® user id (the same value as stored in sysVar.userID). The maximum name size is 19 bytes.

Refer to the CICS® customization manual for more information. The spool file is opened as needed on print statements and closed on close statements for a print form, or when recoverable resources are committed (sysLib.commit(), sysLib.rollback(), or end of transaction or segment).