OSI/MHS Configuration and Management Manual

OSI/MHS Configuration and Management Manual—424827-003
Glossary-10
extension. In X.400, an element of service that was defined in the 1988 recommendations
but was not present in the 1984 recommendations. Some 1988 extensions are
explicitly supported by the GPI, whereas others are not. Those that are supported are
represented by explicit attributes in the GPI. The extensions that are not explicitly
supported by the GPI are made available as BER-encoded data; GPI objects that
include unsupported extensions contain one or more instances of the MH-C-
EXTENSIONS class. See also BER.
external tracing. The recording of actions taken by a management domain with respect to a
message, probe, or report. See also internal tracing.
extensible structured token. In DSM programmatic interfaces, a token consisting of a token
code and a value that is an extensible structure. Extensible structures can be
extended by adding new fields at the end. Such structures are typically used to
indicate the attributes of an object being operated on and to return status and statistics
information in responses; they can also be used for other purposes. The token is
referenced by a token map that describes the structure to SPI so that SPI can provide
compatibility between different versions of the structure. See also simple token.
file number. An integer that represents a particular instance of an open of a file. A file
number is returned by an OPEN procedure and is used in subsequent I/O procedures
to access the file.
filter. In EMS, a file containing a list of criteria against which incoming event messages can
be evaluated to see if they can pass (all criteria met) or not pass (one or more criteria
failed) through the filter.
fixed structure. In DSM programmatic interfaces, a multifield structure declared for the
value of a simple token. Fields cannot be added to fixed structures. See also
extensible structure.
forwarded IPM. An interpersonal message that is enclosed in and being forwarded by
another interpersonal message.
forwarding IPM. An interpersonal message that encloses another interpersonal message,
which is being forwarded.
fully qualified file name. A file specification that includes the volume, subvolume, and file
name ($vol.subvol.filename), possibly preceded by a system name (\system).
gateway. In general, a device or program that connects dissimilar networks at any layer
above the Network Layer, compensating for protocol differences between the
networks.
In X.400, a program that integrates a proprietary messaging system with an X.400
network. For example, the GPI and its client together form a gateway.