Xerox XDPE/400 (also known as EOMS I-Services) Support & Software User Guide

The part of XDPE/400 that processes print jobs is called the Monitor 

Queue. Monitor Queue is used in conjunction with the AS/400 printer 

writer to process spool files for printing on Xerox printers.
The Monitor Queue takes spool files placed in the application output 

queue, processes them, and places them in the processed output queue. 

From there they are written to the printer by the printer writer, as shown 

in figure 1-2.
For information about how XDPE/400 operates, see 

Figure 1-2. 

XDPE/400 and AS/400 printing elements