Xerox 6180N Using LCDS Print Description Language - Page 40

PDL principles and procedures NOTE: Commas and blanks cannot be used interchangeably. Many commands require commas to separate the parameters, and blanks are not valid delimiters. The syntax diagram in each command and parameter description shows which delimiters to use. • Uppercase text: Use UPPERCASE letters when coding PDL commands. Comments, however, need not be in uppercase. Command example The following LINE command example contains three parameters. The right part of the VFU parameter is a reference to an identifier "VFU1." The right part of the DATA parameter has two components that are value constants, and OVERPRINT uses keyword constants. Table 1-3. LINE VFU=VFU1, DATA=(1,10), OVERPRINT=(PRINT,DISP); Command syntax conventions The command descriptions use the syntax conventions shown in the table below. Table 1-4. Syntax conventions Symbol Term Function ( ) Parentheses Enclose options in a command right part that consist of two or more components, separated by commas. { } Braces Enclose a set of choices for a right part component, or the entire right part of a command for which there are two or more alternative ("either-or") options, only one of which must be selected. | Separator Separates alternative command right part options, one of which must be selected. (Means "or.") [ ] Square Enclose components that are optional and not required for the brackets command. , Comma Separates multiple parameters or components of a parameter right part (means "and"). OUTPUT Uppercase (example) letters Denote a keyword for a command, parameter, or option. value Italics (example) Denote a variable you must define. 1-14 Using LCDS Print Description Language