Xerox 4112-4127 Enterprise Printing System-192 - Manual (Page 32)

PDL principles and procedures
1-6 Using LCDS Print Description Language
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).
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.
VFU1: VFU ASSIGN=(1,1), TOF=1, BOF=55;
END;