Xerox 4112-4127 Enterprise Printing System-192 - Manual (Page 99)

PDL principles and procedures
Using LCDS Print Description Language 1-73
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.