Xerox 701P21091 manual Command levels and their general purpose, Command level General purpose

PDL principles and procedures

(Refer to “Coding a JSL” in this chapter for the procedure for creating a Job Source Library.)

PDL commands are organized within a JSL in groupings called “command levels.”

•JDL or system level commands

•Catalog level commands

•Job or JDE level commands

You may code commands within these levels following the JDL command, which identifies the start of the system level. The system level must have at least the SYSTEM or JDL command. The catalog level is not required, and there must be at least one job specified in the JOB level. Some JSLs define only one print job, but it is more common to find JSLs that define multiple jobs.

The following table outlines the command levels and some typical specifications that are included in these various levels.

Table 1-6. Command levels and their general purpose

Command level	General purpose
JDL or system level	Establishes installation defaults.Commands at this level apply by
	default to all jobs (JDEs) within the JSL. Command specifications
	found in a job level, override specifications made at the system level.
	NOTE: Some of these commands require an identifier, by which
	other commands in the JSL can reference them. Commands with
	identifiers are usually coded first; for example, the CODE and PCC
	commands. Commands within this level with identifiers, apply to all
	jobs and catalogs within the JSL.
Catalog level	Groups PDL commands for easy reference at the job level. Catalog
	command sets are defined before the JOB or JDE command that
	references them. The catalog command sets are usually all defined
	before the first JDE or JOB command; therefore, they are considered
	to be coded at a separate level, called the “Catalog level.”
Job or JDE level	Defines how individual print jobs are processed. JDE level
	commands apply only to the job under which they are listed.

Using LCDS Print Description Language 1-19