XL Fortran Enterprise Edition for AIX : User's Guide - IBM

labels can be used to transfer control, to define the
range of a DO, or to refer to a FORMAT statement.
storage association. The relationship between two
storage sequences if a storage unit of one is the same as
a storage unit of the other.
structure.
A scalar data object of derived type.
structure component. The part of a data object of
derived-type corresponding to a component of its type.
subobject. A portion of a named data object that may
be referenced or defined independently of other
portions. It can be an array element, array section,
structure component, or substring.
subprogram. A function subprogram or a subroutine
subprogram. Note that in FORTRAN 77, a block data
program unit was called a subprogram. See also main
program.
subroutine. A procedure that is invoked by a CALL
statement or defined assignment statement.
subscript. A subscript quantity or set of subscript
quantities enclosed in parentheses and used with an
array name to identify a particular array element.
substring. A contiguous portion of a scalar character
string. (Although an array section can specify a
substring selector, the result is not a substring.)
symmetric multiprocessing (SMP). A system in which
functionally-identical multiple processors are used in
parallel, providing simple and efficient load-balancing.
synchronous. Pertaining to an operation that occurs
regularly or predictably with regard to the occurrence
of a specified event in another process.
syntax. The rules for the construction of a statement.
See also semantics.
T
target. A named data object specified to have the
TARGET attribute, a data object created by an
ALLOCATE statement for a pointer, or a subobject of
such an object.
thread. A stream of computer instructions that is in
control of a process. A multithread process begins with
one stream of instructions (one thread) and may later
create other instruction streams to perform tasks.
thread visible variable. A variable that can be
accessed by more than one thread.
time slice. An interval of time on the processing unit
allocated for use in performing a task. After the
interval has expired, processing unit time is allocated to
another task, so a task cannot monopolize processing
unit time beyond a fixed limit.
token. In a programming language, a character string,
in a particular format, that has some defined
significance.
trigger constant. A sequences of characters that
identifies comment lines as compiler comment
directives.
type declaration statement. A statement that specifies
the type, length, and attributes of an object or function.
Objects can be assigned initial values.
U
unformatted record. A record that is transmitted
unchanged between internal and external storage.
Unicode. A universal character encoding standard that
supports the interchange, processing, and display of
text that is written in any of the languages of the
modern world. It also supports many classical and
historical texts in a number of languages. The Unicode
standard has a 16-bit international character set defined
by ISO 10646. See also ASCII.
unit. A means of referring to a file to use in
input/output statements. A unit can be connected or
not connected to a file. If connected, it refers to a file.
The connection is symmetric: that is, if a unit is
connected to a file, the file is connected to the unit.
unsafe option. Any option that could result in grossly
incorrect results if used in the incorrect context. Other
options may result in very small variations from the
default result, which is usually acceptable. Typically,
using an unsafe option is an assertion that your code is
not subject to the conditions that make the option
unsafe.
use association. The association of names in different
scoping units specified by a USE statement.
V
variable. A data object whose value can be defined
and redefined during the execution of an executable
program. It may be a named data object, array element,
array section, structure component, or substring. Note
that in FORTRAN 77, a variable was always scalar and
named.
X
XPG4. X/Open Common Applications Environment
(CAE) Portability Guide Issue 4; a document which
defines the interfaces of the X/Open Common
Applications Environment that is a superset of
438 XL Fortran Enterprise Edition for AIX : User’s Guide