NET/MASTER Network Control Language (NCL) Programmer's Guide

Glossary
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unit definition record. An INMC record, created by the UNIT DEFINE command, that
names and establishes the characteristics of an INMC unit type.
unit type. A type of logical path or connection; its manifestation depends on the
session type. For X.25 session types, a unit is a virtual circuit (either SVC or PVC); for
SNA, it is an LU; and for PTP, it is a file system OPEN.
unloading. Removing an NCL procedure or panel description file from memory after it
has been preloaded.
unmapped UDB. A user database in which NCL treats the data in each record as a
sequence of contiguous bytes. NCL does not interpret the data in an unmapped user
database: an unmapped user database can contain any binary data.
unprotected field. A panel field that can accept input.
unquoted string. Within an NCL statement, a sequence of characters that do not begin
and end with quotes, do not result in a number, and do not have a predefined
meaning when used in a particular context.
unrecognized command. A string of characters that NonStop NET/MASTER MS
assumes to be a NonStop NET/MASTER MS command but that it is unable to process
and execute.
unrecognized statement. A string of characters that, in the current context, NCL assumes
to be the first keyword of a core statement or verb but that it is unable to process and
execute.
unsolicited message. A message that is not generated as the result of an explicit request.
unstructured file. A Tandem Enscribe file type that is essentially a byte array on disk
that starts at byte address 0 and continues sequentially upward through whatever byte
address is identified by the end-of-file (EOF).
unwinding. The orderly dismantling of a nested environment, NCL procedure, or
function to the current nesting level.
User ID Management Services (UMS). The NonStop NET/MASTER MS security service
that enables the definition of authorized NonStop NET/MASTER MS users and their
associated functions and privileges.
User Services. The NonStop NET/MASTER MS service that provides an entry point
into an NCL procedure defined and written by an installation, usually a primary
menu.
user. A general term describing any person or entity that can use NonStop
NET/MASTER MS. There are three types of users: real, virtual, and remote.
user authority level. A number assigned to a NonStop NET/MASTER MS user.
Authority levels range from 0 (lowest) through 255 (highest) The user authority level
is compared with the command authority level to determine if a user can execute a
command.
user database (UDB). A file that NCL can process, including entry-sequenced,
key-sequenced, and edit files, and Guardian processes.