Selecting Printer Features
73
Here are some examples of applications for which you might want to use the
%%Sessions command:
To print “wild card” file selections on UNIX or VMS computer systems.
To print the chapters of a technical manual, such as this one, as a single document.
To print a series of different monthly, weekly, or yearly reports as a batch process.
Terminology
Subjob — what we would normally call a document; that is, a single print job in any
supported page description language (PDL.)
Document — a group of smaller jobs combined by means of the communication pro-
tocol or Document Option Commands which are intended to be printed with a com-
mon set of printing attributes.
Session — a term used to reference a single job from within a document. Jobs are sep-
arated form on another by means of PDL-specific language terminators, or PDL-inde-
pendent language terminators.
PDL-specific terminators — character sequences that when detected in a data stream
indicated the end of a small job to a PDL (for example, Ctrl-D for PostScript or
<ESC><DEL>0 for PCL.) See the appropriate PDL documentation for details of spe-
cific character sequences.
PDL-independent terminators — mechanisms used to separate jobs within a document
that are not defined by the PDL documentation. These mechanisms may include fea-
tures of communication protocols, as well as Document Option Commands such as
%%Session (available only through a network interface.) See “Job Boundary Com-
mands” on page 79 for more information on terminators for serial and parallel proto-
cols.
Using the %%Session Command
Use the DOC %%Session command to separate jobs within the document that are not
separated by PDL-specific terminators. The %%Session command allows any data
acceptable to an emulation, including 8-bit data, to be transferred to the printer without
terminating documents or subjobs early and out of context.
Содержание Crown Document Option Commands
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