ISO/IEC 2022:1994 情報技術—文字コード構造と拡張技術 | ページ 6

4.1

bit combination

An ordered set of bits used for the representation of characters.

4.2

byte

A bit string that is operated upon as a unit.

Note 1 to entry: Each bit has the value either ZERO or ONE.

4.3

character

A member of a set of elements used for the organization, control or representation of data.

4.4

coded-character-data-element (CC-data-element)

An element of interchanged information that is specified to consist of a sequence of coded representations of characters, in accordance with one or more identified standards for coded character sets.

4.5

coded character set; code

A set of unambiguous rules that establishes a character set and the one-to-one relationship between the characters of the set and their bit combinations.

4.6

code extension

The techniques for the encoding of characters that are not included in the character set of a given code.

4.7

code table

A table showing the character allocated to each bit combination in a code.

4.8

combining character

A member of an identified subset of a coded character set, intended for combination with the preceding or following graphic character, or with a sequence of combining characters preceded or followed by a noncombining character.

4.9

control character

A control function the coded representation of which consists of a single bit combination.

4.10

control function

An action that affects the recording, processing, transmission or interpretation of data, and that has a coded representation consisting of one or more bit combinations.

4.11

to designate

To identify a set of characters that are to be represented, in some cases immediately and in others on the occurrence of a further control function, in a prescribed manner.

4.12

device

A component of information processing equipment which can transmit, and/or can receive, coded information within CC-data-elements.

4.13

escape sequence

A string of bit combinations that is used for control purposes in code extension procedures. The first of these bit combinations represents the control function ESCAPE.

4.14

Final Byte

The bit combination that terminates an escape sequence or a control sequence.

4.15

graphic character

A character, other than a control function, that has a visual representation normally handwritten, printed or displayed, and that has a coded representation consisting of one or more bit combinations.

4.16

graphic symbol

A visual representation of a graphic character or of a control function.

4.17

Intermediate Byte

A bit combination which may occur between that of the control character ESCAPE and the Final Byte in an escape sequence.

4.18

to invoke

To cause a designated set of characters to be represented by the prescribed bit combinations whenever those bit combinations occur.

4.19

repertoire

A specified set of characters that are each represented by one or more bit combinations of a coded character set.

4.20

to represent:

4.21

user

A person or other entity that invokes the services provided by a device.