OSI/TS Management Programming Manual

Glossary
Glossary-16 056786 Tandem Computers Incorporated
Presentation default context name. For Tandem OSI/AS, a structure that contains the
default abstract syntax and transfer syntax to be used if the presentation context
definition list is not present.
Presentation default context result. For Tandem OSI/AS, a parameter that indicates the
called application’s acceptance or rejection of the presentation default context name.
Presentation Layer. Layer 6 in the OSI Reference Model. This layer resolves the
differences of varying data formats between systems of different vendors. It transfers
data in a system-independent manner, performing appropriate conversions at each
system as necessary.
Presentation selector. See PSEL.
Primitive. See service primitive.
Printing distributor. An EMS distributor process that obtains formatted text for select
event messages and distributes it to a printer or other display device, or to a file.
Process. A running entity that is managed by the operating system, as opposed to a
program, which is a collection of code and data. When a program is taken from a file
on a disk and run in a processor, the running entity is called a process.
Process handle. A 10-word data structure that identifies a process in a D-series system.
Process handles replace the function provided by CRTPIDs in C series and earlier
systems.
Process identification number (PIN). An unsigned integer that identifies a process in a
processor module. Internally, a PIN is used as an index into the process control block
(PCB) table. PIN numbers from 0 through 254 are low PINs and are supported on both
C-series and D-series systems. PIN numbers from 256 through 65535 are high PINs
and are supported only on D-series systems. PIN 255 is in neither subrange; it is called
a synthetic process ID and allows an unconverted D-series system server process to
communicate with a high-PIN requester process.
Process-name. Form of a process name that is used to communicate directly to the
specified process without going through the OSI manager process and without
updating the management information base (MIB). Contrast indirect-process-name.
Profile. A type of object defining a template that contains configuration parameters for
OSI/AS dynamic subdevices. When a profile is specified for a connection, the
configuration parameters in the profile take precedence over any corresponding
parameters specified for the service as a whole.
Programmatic command. In DSM, a command issued by a program rather than by a
human operator. Compare interactive command.
Programmed operator. In DSM, a management application that performs functions that
might otherwise be performed by a human operator.
Protocol. The set of rules governing the format and meaning of the frames, packets, or
messages that are exchanged by the peer entities within a layer. Compare service.