Xerox 6180N Using LCDS Print Description Language - Page 28

PDL principles and procedures Enabling PDL features and functions To enable these functions, you enter PDL commands to enable the following for your print job: • Describe the input (type, format, characteristics, and source) • Define any logical or special processing functions to be performed on selected text, pages, or copies • Describe the output (type, format, font selection, accounting options, and destination) Each command has a set of parameters and parameter options used to define the above characteristics of a print job. PDL commands may be specified in the following ways: • In a Job Source Library (JSL) • As Dynamic Job Descriptor Entries (DJDEs) Job Source Libraries (JSLs) One way to issue PDL job definition commands to your printing system is to create a text file of these commands for your job. The source (text, uncompiled) file of PDL commands is called a "job source library" (JSL) file. The JSL file is then compiled by the system to create an object file, called a "job descriptor library" (JDL). Each compiled JDL file is stored in a resource folder named "lcds" located on the print server disk. The system accesses the required JDL from the "lcds" folder when the operator specifies it to start a job. When a job is sent from the host, the printing system reads the specified JDL and obtains instructions on what fonts and forms to use when printing the job as well as where to direct the printed output. Dynamic job descriptor entries (DJDEs) Dynamic Job Descriptor Entries (DJDEs) are parameters embedded within the input data stream. They modify the printing environment established by a job descriptor entry (JDE) within a JDL, as the job is printing. DJDEs allow page by page or record by record modifications to your applications. Most PDL commands are also available as DJDEs. Refer to "PDL command and DJDE summary," Appendix A, for information on which PDL commands have DJDE counterparts. In order to use DJDEs, you must specify an IDEN command in the JSL to advise the system that DJDE records are included in the input data stream and where to look for them. 1-2 Using LCDS Print Description Language