Xerox 6180N Using LCDS Print Description Language - Page 110

Specifying input parameters Input processing functions The following functions are part of input processing on the FreeFlow Print Server LCDS systems. Input processing online For online printing, the LCDS data is transmitted from a host computer either directly or through a protocol converter. The FreeFlow Print Server LCDS systems receive print data either over a channel through bus and tag cables, or through the Socket Gateway or lpr using TCP/IP protocol. The LCDS data stream emulates the IBM 3211 or 4245 line printer format. All commands coded for the 3211 may be coded for the 4245. In online 3211 mode, the data stream emulates an IBM 3211 line printer format, with or without embedded DJDEs. Basic input processing functions are augmented by the following functions for online 3211 or 4245 mode operations: • Handling all interactions with the online interface hardware. • Building translate tables based on the present contents of the current FOLD or UNFOLD command that is in effect. • Processing form control buffers (FCBs) that are received from the host to redefine channel to line number assignments. Specifying DJDE processing online Online printing is controlled through parameters from a user defined .JDL file. You can dynamically override these parameters by Dynamic Job Descriptor Entries (DJDEs). The DJDEs that you specify are processed by the system as part of the input print data from the host. The IDEN command enables the system to identify DJDEs as commands and not part of the input data. Refer to the "IDEN command" section later in this chapter for information on the use and parameters of this command. Nonprint files, such as font files, can be downloaded from the host using the FILE command. Refer to "FILE DJDE" in the "Using Dynamic Job Descriptor Entries (DJDEs)" chapter of this guide. 2-2 Using LCDS Print Description Language