NET/MASTER Network Control Language (NCL) Reference Manual

Glossary
Glossary–36 106126 Tandem Computers Incorporated
Transaction Application Language (TAL). The Tandem language, which is used to write
systems software and routines, that supports transaction-oriented applications.
transmission header (TH). In SNA, routing and control information, optionally followed
by a basic information unit (BIU) or a BIU segment.
trigger life. A time interval within which an RMS message action rule is regarded by a
message group rule as having been triggered. The trigger life starts counting down
when a message triggers the message action rule.
truncation character. The character used to indicate the position at which a message is
truncated on an OCS window: a plus sign (+).
type conversion. How NCL automatically converts values from one type to another,
depending on context. There are two basic types: string and numeric. Numeric
includes the subtypes floating point, integral, and Boolean.
UANCL. See Utility Access NCL.
UDB. See user database.
UDB identifier. A unique identifier that NonStop NET/MASTER MS assigns to a user
database so that an NCL process can access the user database.
UDB pair. Two key-sequenced files that are treated as a single logical UDB in all UDB
operations. See also file pair.
UMS. See User ID Management Services.
UMS database. The database, maintained by UMS, that stores user ID definition
records.
unary operators. Operators that change the sign of a number. There are two unary
operators: plus (+) and minus (-).
unenumerated mapped data object variable. A mapped data object variable that stores raw
data only.
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.