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

Glossary
Safeguard Management Programming Manual—422086-028
Glossary-10
maximum field version
maximum field version. In an SPI message, the latest version associated with any non-null
field of any extensible structured token in the message. The maximum field version of
the SPI message is contained in a header token. It corresponds to the version of the
oldest server or requester that can successfully process the message.
message. A block of information, usually in the form of a structure, that is sent from one
process to another. See also SPI message.
message buffer. A sequence of memory locations used for the contents of an interprocess
message. See also SPI buffer.
message code. The contents of the first word of an interprocess message. A message
code of -28 identifies the message as an SPI message.
nested error list. An error list contained in another error list. When an error in one
subsystem or in a library procedure prevents another subsystem from performing a
command, the calling subsystem reports this pass-through error by nesting error lists in
its own response. For instance, a response from FUP might include an error list
explaining the FUP error, which in turn contains an error list explaining the SORT error
that caused the FUP error. See also pass-through error.
next position. The location at which a subsequent operation will take place. In SPI, the next
position is the location in the SPI buffer from which SSGET normally retrieves a token
value or token attribute. (An exception is the special calling mode for requesting an
attribute of the current token.) See also current position and initial position.
noncritical event. An event that is considered not to be critical to the operation of the
system or network. Each subsystem determines what set of events generated by that
subsystem should be designated as critical. The others are noncritical. The subsystem
identifies whether an event is critical or noncritical by setting the value of the emphasis
token in the event message. See also critical event.
nonsensitive command. A subsystem command that can be issued by any user or
program that is allowed access to the subsystem—that is, a command on which the
subsystem imposes no further security restrictions. For data communications
subsystems for NonStop servers, the nonsensitive commands are those that cannot
change the state or configuration of objects. For these subsystems, most nonsensitive
commands are also information commands. See also sensitive command
.
NonStop internal token. A token in an event message that is intended for interpretation
and use only by software for the NonStop server. See also conditional token
and
unconditional token
.
null object type. A place-holder object type that management applications can use in
programmatic commands that do not require explicit specification of a particular object
type.
null value. A value indicating that a program has made no explicit assignment to a variable
or field. In the context of SPI, a field of a structure has a null value if the application has