PDF《Part II》

however, all X coordinates must have a corresponding Y coordinate. EN HP-GL/2 Commands and Syntax 17-9 Note Remember that while X,Y coordinates are shown in parentheses in text [for example (3,4) or (0,0)], the parentheses are not part of the syntax. Do not enter these parentheses in your commands. ;

iCommand terminator. In most HP-GL/2 commands, a semicolon is optional, and is shown in parentheses in most command syntax. Notes Three exceptions to the optional use of the semicolon as a command terminator occur in the following commands: Polyline Encoded (PE), Label (LB), and Comment (CO). PE must be terminated by a semicolon. LB is terminated by the non- printing end-of-text character (ETX - decimal 3), or a user-defined character. The comment string of the CO command must be delimited by double quotes. A semicolon terminator is always required following the last command prior to leaving HP-GL/2 mode. , A comma is always shown as the separator between parameters. A space, +, or - is also valid (although not preferred). (A + or - is a valid separator only for numeric parameters.) Omitting Optional Parameters Some commands have optional parameters that take on defau........