Xerox 6180N Using LCDS Print Description Language - Page 31

PDL principles and procedures Command identifier Some PDL commands require identifiers to precede their command keywords. By coding an identifier before a command, you associate the identifier with the command. This allows the command to be referenced (by its identifier) by other commands within the JSL. Some identifiers also determine the names of the files that the Xerox Job Descriptor Compiler creates. Different syntax rules apply to identifiers, depending on the command being coded. Each command description in this document tells you if an identifier is required (or optional) for the command and if so, how it must be coded. In most cases, in a JSL, if a command will be referenced by another command within the JSL, an identifier must precede the keyword of the referenced command. A command identifier is defined using a label of up to six alphanumeric characters, followed by a colon (:). Two types of identifiers can be used: 1. ac type: Must have at least one alpha character, that is, a letter. 2. dd type: May have all numerals, all alpha characters, or a combination of both. The following PDL command has the command identifier VFU1 and the command keyword is VFU. VFU1: VFU ASSIGN=(1,1), TOF=1, BOF=55; END; The identifier in this command may have any number of blanks following the VFU1 characters; however, no blanks are permitted within the identifier name. NOTE: A command that requires an identifier must always be defined before any other command that references it. Command keyword Every command must have a keyword, which is the "name" of the command for which various parameters may be selected. In the following example, CME is the command keyword (CME4 is the identifier). CME4: CME LINE=(1,60), POSITION=5, FONT=2; In the next example, the command keyword OUTPUT can be followed by any number of parameters, such as: OUTPUT GRAPHICS=YES, DUPLEX=NO, FORMAT=PDFLT, FORM=BAR; Using LCDS Print Description Language 1-5