SNAX/APN Application Programming Manual

Glossary
SNAX/APN Application Programming Manual—420111-001
Glossary-4
domain
domain. In SNA, a system services control point and the physical units, logical units, links,
and associated resources that the system services control point has the ability to control
by means of activation requests and deactivation requests.
double-byte character. A character represented in two bytes. See also double-byte character
set.
double-byte character set. A character set, such as Tandem Kanji, that uses two bytes of
data to represent a single character. SNAX/APN does not support any double-byte
character sets.
EBI. See end-bracket indicator (EBI)
.
ELF. See Enhanced Logon Facility (ELF)
.
end-bracket indicator (EBI). A value in a request header that denotes the end of the bracket.
end user. In Systems Network Architecture (SNA), the ultimate source or destination of
information flowing through the network. It may be an application program, an operator,
or a data medium (such as cards or tapes).
Enhanced Logon Facility (ELF). A feature of the SNAX/APN-EN (End Node) product that
enables LU-LU sessions between Tandem applications and remote 3270 devices in an
IBM network. ELF works in conjunction with the IBM Session Services Extension
(SSE) and it does not require the installation of Tandem software on an IBM system.
ELF is not supported in the SNAX/APN (LEN Node) product.
error. A condition that causes a command or other operation to fail.
error number. A value assigned to a return token, or to the last field of an error token, to
identify an error that occurred.
extended binary-coded decimal interchange code (EBCDIC). An 8-bit coded character
set. One of two major codes used to represent and exchange data (the other is ASCII).
EBCDIC uses the eighth bit for an information bit, which extends the range of distinct
characters to 256.
Extended Logon Facility (XLF). A feature of SNAX/APN that enables LU-LU sessions
between Tandem applications and remote 3270 devices in an IBM network and between
Tandem applications that emulate 3270 devices and applications in an IBM network.
See also SNAX/APN Logon Manager (TLOGMGR)
and Tandem Logon Manager for
IBM Systems (ILOGMGR). TLOGMGR and ILOGMGR are the components of XLF.
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 all subsequent input/output (I/O)
procedures to refer to the file.
file system. 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.