Xerox 6180N Using LCDS Print Description Language - Page 99

PDL principles and procedures Dynamic job descriptor entries (DJDEs) Dynamic job descriptor entries (DJDEs) are parameters embedded within the input data stream. DJDEs modify the printing environment established by a job descriptor entry (JDE) as the job is printing. Dynamic job descriptor entry processing allows certain JDE parameters to be changed for individual pages or records. The IDEN command, coded in a JDE, notifies the system that DJDE records are included in the input data stream, specifies where the DJDEs commands are embedded in the data record, and specifies how to identify the DJDE records. Benefits of using DJDEs There are several reasons to use DJDEs to change job parameters: • The printing system does not need to stop between reports nor does it require operator intervention. The operator starts a job on the printing system and typically returns to the system for minor operational activity only. • Forms may be changed on specific pages. • Many variations on VFU channel, margin, Top Of Form (TOF) and Bottom Of Form (BOF) assignments may be applied to reports as they are created instead of being stored in the printing system in JDL files. This dynamic processing reduces the number of JDEs that need to be maintained. • DJDEs can be used to satisfy unusual processing requirements more easily. • Varying numbers of copies can be generated automatically with routing or distribution notification sent to the operator. • Print resources (such as forms and fonts) or nonprint data can be downloaded onto the system disk through the print data stream. Using LCDS Print Description Language 1-73