IBM 1725 SLS - Manual (Page 277)

Sessions
D-3 Sessions
Here are some examples of applications for which you might want to
use sessions:
n
To print “wild card” file selections on UNIX or VMS computer
systems.
n To print the chapters of a technical manual, such as this one,
as a single document.
n To print a series of different monthly, weekly, or yearly reports
as a batch process.
How is a Session Used?
A session is invoked by the DOC %%Session command.
Language-independent delimiters included in the command allow any
data acceptable to an emulation, including 8-bit data, to be trans-
ferred to the printer without terminating documents or subjobs early
and out of context.
» Note: The session mechanism is supported only for optional network
interfaces on QMS Crown printers at this time. It is not supported for jobs
submitted through any other interface — LocalTalk, parallel, or serial. Use of
the %%Session command in print jobs submitted over non-network
communication channels may lead to incorrect or erroneous output.
Session Command Location
The session command must
n
Be placed at the beginning of the data stream of a document
to delimit the session boundaries.
n
Precede all of the data that belongs to an individual subjob.
This will ensure that the command is not saved in the actual
data stream that is passed to a language or emulation.
Some host applications add DOCs at the beginning of a document’s
data stream before transmitting a job to the QMS Crown printer. If you
do not ensure that such features are completely disabled, the pro-
cessing of the %%Session command will be terminated, and unex-
pected results may be printed.