Safeguard Management Programming Manual (G06.29+, H06.08+, J06.03+)

Glossary
Safeguard Management Programming Manual—422086-028
Glossary-9
Linkage Section
subsystem defines an is-present field referring to the contents of another field only if no
null value can be recognized because every value that can fit in the other field is
meaningful to the subsystem.
Linkage Section. The SCREEN COBOL source program section that describes the
structure of parameter data passed to a SCREEN COBOL subprogram by a CALL
statement. See extras.
list. In an SPI message, a grouping of tokens that defines a context for scanning the buffer
and extracting tokens with the SSGET procedure. A list construct imposes hierarchy in
the buffer. To retrieve the tokens from a list, the application must first position to the
start of the list by retrieving the initial list token, then retrieve tokens from the list, and
then pop out of the list to the next higher level of tokens by retrieving the end-list token.
SPI defines three kinds of lists: data lists, error lists, and generic lists.
list token. A syntax token that begins a list. SPI defines three different tokens to begin a list,
depending on the type of list: the data-list token, the error-list token, and the generic-
list token. See also end-list token and syntax token.
macro. A sequence of TACL commands and built-in functions that can contain dummy
arguments, thus providing a means for simple argument substitution. No validity
checking of the arguments is performed. When the macro name is given to TACL,
TACL substitutes the expansion of the command sequence for the name, replacing any
dummy arguments with parameter values supplied in the invocation. See also routine.
management application. A program or set of programs that issues commands to
subsystems, retrieves event messages, or does both things, to assist in managing a
computer system or a network of systems. A management application is a requester
with respect to the subsystems to which it sends commands. The subsystems are
servers with respect to the management application.
management interface. An interactive or programmatic interface through which one can
manage a subsystem and its objects. In some subsystems, a specific process is
dedicated to the management interface. In other subsystems, the process that
provides the management interface also performs other functions.
management process. The process through which an application issues commands to a
subsystem. A management process can be part of a subsystem, or it can be
associated with more than one subsystem. In the latter case, the management process
is logically part of each of the subsystems. The Subsystem Control Point (SCP) and
PATHMON are examples of management processes.
manager process. A particular process within a subsystem that is the target of a command,
the reporter of an error, or the manager of the subject of an event message. In data
communications subsystems for the NonStop server, the process with which the
Subsystem Control Point (SCP) management process communicates to control a
particular subsystem. The Expand manager process, $ZNET, and the X25AM line
handlers are examples of manager processes.