Distributed Name Service (DNS) Management Programming Manual

Glossary
46958 Tandem Computers Incorporated Glossary–7
Error list. A grouping of tokens used within a response record to provide error and
warning information. An error list consists of a list token that denotes an error list
(different from the token that starts a data list or a generic list), followed by an error
token, other tokens explaining the error (these are optional), and an end-list token.
Error lists can be nested within other error lists. The return token cannot be included
in an error list. See Return token.
Error number. A value that can be assigned to a return token, or to the last field of an
error token, to identify an error that occurred. SPI defines a small set of error
numbers, but most error numbers are defined by subsystems.
Error token. A response token that indicates the reason an error occurred in performing
a command. Tandem subsystems enclose each error token in an error list, which can
also contain additional information about the error. A response record must contain a
return token, and can also contain error lists to explain the error further. The token
code for the error token is ZSPI-TKN-ERROR. Its value is a structure consisting of the
subsystem ID and an error number identifying the error. See also Error list, Error
number, and Return token.
Event. A significant change in some condition in the system or network. Events can be
operational errors, notifications of limits exceeded, requests for action needed, and so
on.
Event management. The reporting and logging of important events that occur in a
system or network, the distribution and retrieval of information concerning those
events, and the actions taken by operations personnel or software in response to the
events. Compare with Control and inquiry.
Event Management Service. A software facility that provides event-message collection,
logging, and distribution facilities for the Guardian 90 operating system (implemented
as a major enhancement of the Guardian 90 operator process, $0). It provides for
different descriptions of events for human beings and for programs, lets an operator or
application select conveniently from event-message data, and allows for flexible
distribution of event messages within a system or network. It has programmatic
interfaces based on SPI for both event reporting and event retrieval. See also Event
message.
Event message. In programmatic interfaces based on SPI, a special kind of SPI message
that describes an event occurring in the system or network. In Viewpoint, the
displayed form of such a message, shown as one line of text.
Event-message header. The header of an event message. An event-message header is
one kind of SPI message header. Compare with Standard command header.
Execute authority. The privilege to create a process based on a particular code file. In
DNS, the security attribute value required to change the state or configuration of
DNS—for example; to start DNS, add a DNS process, or alter the name of a file in the
DNS database.
Export. To copy a name to a remote node, or to propagate a modification of a name to
the remote nodes on which the name resides.