TS/MP Pathsend and Server Programming Manual (G06.24+, H06.03+)

Glossary
NonStop TS/MP Pathsend and Server Programming Manual–132500
Glossary-8
expandability
expandability. See scalability.
Expand networking software. Tandem software that can connect up to 255 Tandem
NonStop systems into a single network.
Extended General Device Support (GDSX). A Tandem product that facilitates
communication between general I/O devices and a PATHMON environment by acting as
a front-end or a back-end process.
extensible structured token. In the Subsystem Programmatic Interface (SPI), a token with a
value that can be extended by appending new fields in later releases. The token is
accessed through reference to a token map containing field-version and null-value
information, allowing SPI to provide compatibility between different versions of the
structure. See also simple token and token (definition 2).
external PATHMON process. See external process.
external process. A process in a different PATHMON environment from the process with
which it is communicating. For example, suppose a TCP managed by PATHMON
process $PMB requests a link to a server process in a server class that is managed by
PATHMON process $PMA. Both the TCP and PATHMON process $PMB are external
processes with respect to PATHMON process $PMA and the server class managed by
$PMA.
external server. See external process.
external TCP. See external process.
fault tolerance. The ability of a Tandem NonStop system to continue processing despite the
failure of any single software or hardware component within the system.
field-characteristic clause. In SCREEN COBOL, an ordered set of characters that specify
the characteristics of a screen field.
file identifier (file ID). In the Guardian environment, the portion of a file name following the
subvolume name. In the OSS environment, a portion of the internal information used to
identify a file in the OSS file system. The two identifiers are not comparable.
file name. In the Guardian environment, the set of node name, volume name, subvolume
name, and and file identifier characters that uniquely identifies a file. This name is used
to open a file and thereby provide a connection between the opening process and the file.
See also fully qualified file name, partially qualified file name, OSS filename, and OSS
pathname.
file-name expansion. The expansion of a partially qualified Guardian file name for a disk file
to include the associated node, volume, and subvolume names.
file system. (1) In the Guardian environment, the application program interface for
communication between a process and a file. A file can be a disk file, a device other than
a disk, or another process. (2) In the OSS environment, a collection of files and file