Xerox 6180N Using LCDS Print Description Language - Page 45

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