Xerox 6180N Using LCDS Print Description Language - Page 32

PDL principles and procedures Refer to Appendix A, "PDL command and DJDE summary," for a list of all available command keywords. Parameters Each command keyword is followed by parameters. Parameters give precise specifications for the print job or application. • In commands that comprise a JSL, each parameter consists of a left part and a right part, separated by an equal (=) sign. (Spaces before and after the equal sign are optional.) The left part is the parameter name; the right part indicates the parameter options or values. • In DJDEs, the left part is the DJDE command name. The DJDE options are right part components, following the equal sign. Parameter options and right part components The right part of a parameter contains the options, which may consist of keywords, variable references, and value or string constants. Each parameter has one or more options. For example, the OFFSET parameter of the OUTPUT command (which can be shortened to OUTPUT OFFSET parameter) has three options: ALL, FIRST, and NONE. Some parameter options have multiple components. Some of these components must have values specified; others are optional. Parentheses are used to enclose multiple components of a right part, as shown in the following example. In the example below, the VFU command has three parameters: ASSIGN, TOF (top of form), and BOF (bottom of form). VFU1: VFU ASSIGN=(1,1), TOF=1, BOF=55; END; In this example, the ASSIGN parameter option has two components. Multiple components of an option must be coded in the order shown in the command description syntax diagram. • Keywords Keywords are terms that direct the system to perform specific activities. Keywords always consist of the same characters and do not vary. 1-6 Using LCDS Print Description Language