Technical data

the printing software. For example, you need to set the sides-supported
and sides-ready attributes of a physical printer so that users can print
two-sided documents .
Physical printers, logical printers, spoolers, and supervisors treat supported
and ready attributes as described in the following list:
• Physical printers have both xxx-supported and xxx-ready attributes.
When a job specifies input-tray=top, the physical printer attributes
input-trays-supported and input-trays-ready must both contain
“top” as one of their values.
The feature must be both supported and ready to receive jobs that specify
the feature. If the feature is supported but not ready, the job will not
be scheduled until the feature becomes ready. Some xxx-supported
attributes have no xxx-ready counterpart.
• Logical printers have only xxx-supported attributes. Readiness of a
feature only pertains to physical printers. Jobs can be submitted to a
logical printer when the features it requests are supported.
• Spoolers have several xxx-supported and xxx-ready attributes that
specify the objects and capabilities, such as logical printers and queues,
defined in the spooler’s database.
• Supervisors have several xxx-supported and xxx-ready attributes
that specify the objects and capabilities defined on the supervisor and
its database.
See Chapter 5 for more information about the supported and ready
attributes you need to set.
1.1.8 Name Services
In Advanced Printing Software, servers, printers, and queues are identified
by name. Name services make it possible for distributed clients and servers
to find the network address of an object from its name. Clients and servers
use the name services to locate one another when processing requests.
1.1.9 Server Databases
Servers maintain objects, such as printers, queues, and jobs, in a persistent,
on-disk database. That allows you to define attributes for those objects that
remain on the system until changed, even when it is rebooted. You create
printer, queue, and initial-value objects to support the needs of users. Job
and document objects are created when print clients submit jobs. All of these
objects, except for physical printer objects, are stored in a spooler’s database.
Physical printer objects are stored in supervisor databases.
1–6 Advanced Printing Software Overview