GB/T 11383-1989 Information processing - Eight-bit code structure and encoding rules for information exchange
Some standard content:
National Standard of the People's Republic of China
Eight-bit code for information interchange
Information processing
Structure and coding rules
Information processing-s-bit code for information interchange-Structure and rules for inplementation GB 11383-89
ISO4873-1886
This standard is equivalent to the international standard [ISO1873-1986 (Information processing-8-bit code structure and coding rules for information interchange), and specifies specific graphic characters for the code table positions reserved for use by various countries in accordance with (B1988-80 "Seven-bit coded character set for information processing interchange".
1 Subject content and scope of application
This standard specifies the eight-bit code derived from B1988 and is compatible with it. This eight-bit code also complies with the provisions of ":12311-80 "Supplementary method for seven-bit coded character set for information processing interchange". Standard provisions The eight-bit code has only some options, and provides guidance on how to use these options to specify a specific version.
This character set is mainly used for information exchange between data processing systems and related equipment in eight-bit code systems and within data communication systems, and takes into account the graphic characters and control functions required in data processing. This character set includes 52 original lowercase and uppercase letters, and may also include phonetic letters, special letters and (or) one or more non-letters.
2 Reference standards
GH1988 Seven-bit coded characters for information exchange B311
Supplementary method for seven-bit coded character sets for information exchange G 3453
Data communication basic control procedures
GB 6261
Supplementary control functions for text and symbol forming equipment 3 Conformity and representation method
3.1 Conformity
If the 8-bit code is in accordance with the version specified in Chapter 8 of this standard, it is in accordance with this standard. Equipment that can implement this standard shall use the version of the 8-bit code in accordance with Chapters 8 and 9 of this standard to exchange information at the specified level and shall indicate its version and level.
3.2 Representation method
When using this code, it is necessary to specify the representation method of this code on various media. These media It shall include magnetic and optical media and transmission channels, thereby allowing data to be exchanged directly between intermediate records recorded on physical media 1, or through data transmission equipment.
The method of recording such codes on physical media and transmitting them shall not be specified in other standards, but error checking shall be considered. 4 Terminology
This standard adopts the following terminology:
Approved by the State Administration of Technical Supervision on July 4, 1989
..com199001-01Implementation
4.1 Byte group
GB 11383--89
An ordered set of binary digits used to represent a symbol or its sub-character. 4.2 Character
An element in a set of elements used to organize, control, and represent data. 4.3
Coded character set, code
A well-defined rule that determines the correspondence between a character set and each character in the character set and its coded representation (in one or more bits).
4.4 Code extension
A method of encoding characters that are not included in a given character set. 4.5 Code table
A table that represents each character in a code and its specified bit group. .6 Control symbols
Characters with control functions, whose coded representation consists of a single bit. 4.7 Control function
An action that affects data recording, processing, transmission or interpretation, whose coded representation consists of one or more byte groups: 4.B Graphic symbols
Characters with different control functions, which have visual graphics, usually represented by hand, printing or display, and whose coded representation consists of one or more byte groups.
4.9 Graphic symbols
Graphic characters are visual representations of control functions, 4. 10
The columns and rows in the code table must be marked. 5 Notation, code table and names
5.1 Notation
In the eight-bit code, each bit of the eight-bit group is represented by bu, b, bs, b, b, b, b, b, where b is the most significant bit and b: is the least significant bit.
In binary notation, by weighting each bit with the following weights, the bit can be interpreted as representing a number in the range of 0 to 255. Bit
In this standard, bit groups are represented by a notation of the form XX, YY, where XX and YY are numbers in the range 0 to 15. The notation of the form X is used to represent bit groups consisting of bits from 0 to 15 as follows: a, X is the number represented by b, b, b and h, with weights of 8, 4, 2 and 1 given to h, b7, b and b, respectively. Y is the number represented by b, b, b and b, with weights of 8, 4, 2 and 1 given to b, b, and b, respectively. The notation of the form XX/YY is the same as the notation used to represent positions in the code table, where x is the column number and YY is the row number (see 5.2).
5.2 Code table
The eight-bit code table consists of 256 positions arranged in 16 columns and 16 rows. These columns are numbered 1 to 5. The code table position is indicated by a notation of the form XXY, where XX is the column number and YY is the row number. The code table position has a corresponding relationship with the code bit. The notation of the code table position indicated by the form XXYY is the same as the notation of the corresponding bit group.
5.3 Names
GB 11383-89
This standard specifies at least one name for each character. In addition, an abbreviation is specified for each control character and spacing character, and a graphic symbol is specified for each glyph. According to the usual practice, only Chinese boldface characters and graphic symbols for human letters, lowercase letters and hyphens are used as names for written characters.
The names selected to represent graphic symbols reflect their customary meanings, but this standard does not specify or restrict the meanings of these symbols, nor does it specify the names of graphic sub-characters.
6 Structure of the octet code
6.1 Basic components of the octet code
The octet code consists of the following parts:
a. Character set
A character set consisting of 30 control characters, which are represented by byte groups 00/00 to 0115, except for byte groups 00/14 and 0015 which should not be used.
b. Space character
A character represented by byte group 02(0:), which can be interpreted as a control character or a graphic character, or as both a control character and a graphic character.
h. A character set consisting of up to 94 graphic characters represented by byte groups 0201 to 0714.d. Erase character
A control character represented by byte group 0715.
A character set consisting of up to 32 control characters represented by byte groups 08 to 0915.f. G1 set
A character set consisting of up to 96 graphic characters represented by the bit group 1000 to 1515. G2 set
A character set consisting of up to 96 graphic characters. h, G3 set
A character set consisting of up to 96 graphic characters. 6.2 Initial conditions
At the beginning of any information exchange, a default C0 set consisting of only escape characters should be assumed. 6.3 Indication and call
For simplicity, this standard lists three-character escape sequences. It is also possible to use or select escape sequences of multiple characters. The format and usage of escape sequences are detailed in GB 2311.
6.3.1C0 set
The C0 set should be arranged in columns 00 and 01 of the code table. It should be composed of the escape sequence LSC 02/01 H refers to just and call. 6.3.2 The question separator character
The question separator character should be arranged at position 02/0) in column 02. It does not need to be explicitly specified and called. 6.3.3 G0 set
The G0 set should be arranged at positions 02/01~07/14 in columns 02~07. It should be specified by the escape sequence ESC:02/08F and called according to the provisions of Chapter 9.
Erasure character
Instructions for use:
1) The original text uses the Ningmu character to represent the Chinese character, so Zengchuan uses boldface to represent it. GB 1138889
The erasure character should be arranged at position 07/15 in column 07. It does not need to be explicitly specified and called. 6.3.5 C1 set
The C1 set shall be arranged in columns 08 and 09. It shall be indicated and called by the escape sequence ESC02/02F. 6.3.6 G1 set
When called, the G1 set shall be arranged in columns 10 to 15. It shall be indicated by the escape sequence ESC02/09F or ESC02:13F and called in accordance with the provisions of Clause 9.
6.3.7 G2 set
The G2 set shall be indicated by the escape sequence ESC02:10F or ESC02/14F. This character set is either entered as a whole into columns 10 to 15 by the shift function LS2R, or individual characters of this character set are called by the single shift function SS2. 6.3.8 G3 set
The G3 set shall be indicated by the escape sequence ESC02:i1F or ESC02/15F. The character set is either transferred as a whole to columns 10-15 by the lock shift function LS3R, or individual characters of the character set are transferred using the single shift function SS3. 6.3.9 Summary of structure, designation and call
Figure 1 summarizes the structure of the eight-bit code and the designation and positional arrangement of its parts. EERCoo
doneto
Q00013
000005
GB11383—89
00020304050708092145
Structure of the eight-bit code
7 Detailed description of each character in the eight-bit code
Requirements for the C set:
GB 11383B9
Signature group 014 and 00:15 [see Appendix D (reference)] should not be used; bit group 0111 should be allocated to control characters. Meaning: Other bits can be allocated to control characters according to the restrictions specified in the appendix (supplement). Note: Only the escape character diagram Co of bit 01/11 has been registered, and it is marked with FSC210407. 7.2 Escape Characters
Escapes are control characters that form escape sequences. In standard English, escape sequences are used to specify the printing grade, as well as to indicate and adjust the character set.
The writing symbol
represents
7.3 Escape Characters
This character can be interpreted as a graphic character, a control character, or both a graphic character and a control character. As a graphic character, it has a visual representation without a graphic symbol. As a control character, it acts as a control character, which moves the operating position forward one character position. The abbreviation symbol
represents
94 bits 02/01 to 07:14 are used to represent graphic characters. All graphic characters in the range of bits 02/01 to 07:14 are forward characters, that is, they cause the operating position to move forward. 7.4.1 This standard specifies the graphic characters for 93 of the 94 digit groups. 7.4.2 Specifies the graphic characters for digit groups 02 and 04. 7.4.1 and 7.1.2 each include a table consisting of two columns, the first column specifies the graphic symbol for each graphic character, the second column specifies the standard name of the graphic symbol, and the third column specifies the digit group representing the corresponding graphic symbol. 7.4.1 Allocation of specific graphic characters
Except for digits 02/04, a specific graphic sub-character is allocated to a digit group from 02:01 to 07/14 of the 93 digit groups. These characters are specified in Table 1.
Adoption instructions:
1] This clause has filled in the 55 table positions reserved for use by various countries according to GB 1988. Drawing number
GB 11383--89
Table 1:
Specified graphic character allocation table
Sensitive symbol
Double quotation mark
Digital symbol
Percentage
Right quotation mark
Left bracket
Right bracket
Hyphen, minus sign
Digit two
Digit three
Digit four
Digit five
Coding table
Opening symbol
GB 1138389
Continued Table 1
Number six
Number seven
Number eight
Digits
Less than symbol
Equal to symbol
Greater than symbol
Commercial price symbol
Capital letter D
Capital letter E
Capital letter F
Capital letter G
Capital letter
Capital letter I
Coding table
Character symbols
GB 11383—9
Continued Table 1
Capital letter
Capital letter K
Capital letter L
Capital letter M
Capital letter O
Capital letter P
Capital letter Q
Capital letter R
Capital letter S
Capital letter T
Capital letter U
Capital letter
Capital letter W
Capital letter X
Capital letter Y
Capital letter M
Left bracket
Backslash
Right bracket
Code representation
Original number
GB 11883a9
Continued Table 1
Upward arrow
Downline
Left single quotation mark
Small letter a
Lower case letter
Lower case letter Z
Lower case letter
Small letter e
Small letterbZxz.net
Small letter h
Small letter i
Lowercase letters
Lowercase k
Lowercase "letter"
Lowercase "letter m
Lowercase "letter n
Lowercase "letter"
Onanoletter
Lowercase letter
Editor Pei Xiao
.06:03
Graphic symbols
Allocation of selectable graphic characters
GB 1183—B9
Continued Table 1
Lowercase letter r
Lowercase Latin letter 5
Lowercase letter t
Lowercase Latin letter
Lowercase letter x
Lowercase Latin letter
Lowercase letter
Left curly bracket
Right curly bracket
Overbar
Two optional graphic characters are assigned to group 02/04: these characters are specified in Table 2.
Table 2 Allocation table of optional graphic characters
Pavilion-shaped symbol
Yuan currency symbol
International currency symbol
Encoding
07: 09
Encoding
The graphic symbol ￥ in bit group 02/04 can be directly used as the symbol and limit symbol of our currency (RMB) and is commonly used in China. If you want to use this symbol to represent the currency of a specific country in the world, you must use ? and other graphic characters in Table 1 to represent it. The graphic symbol in bit group 02/04 is a universal currency symbol in international information exchange. It must be used in combination with other graphic characters in Table 1 to represent the currency of a specific country. In the application process, if the parties concerned have an agreement or convention, the symbol "$" can also be used instead of "
" as a currency symbol.
Erasure character
GB11383-B9
Erasure is used to eliminate or cover an erroneous or unnecessary character on the perforated tape. Erasure characters can be used as media fillers or time blanks. They can be inserted into or removed from the data stream without affecting the information content of the data stream, but this action may affect the information format and (or) the control of the device. Abbreviation symbol
7.6 C1 Set
Coding Table
The C1 set can obtain up to 32 control characters in addition to the control characters provided by the C0 set. It should not include any control characters in Appendix A.
No specific control characters are assigned to positions 08/00~08/13 and 09/00~09/15. When using the single shift function SS2 and ISS3, they should be assigned to positions 08/14 and 08/15 respectively. Otherwise, these positions should not be used.
The G1 set is a graphic character set composed of 94 characters or 96 characters. Graphic characters in addition to the graphic characters provided by the G1 set can be obtained from this character set. A specific graphic character should be assigned to each position or it should be clearly stated that the position is not used. If the G1 set is a character set consisting of 94 characters, the characters of the G1 set are represented by the bit groups 10/01 to 15/14. If the G1 set is a character set consisting of 96 characters, the characters of the G1 set are represented by the bit groups 10/00 to 15/15. 7.8 G2 set
The G2 set is a graphic character set consisting of 94 characters or 96 character lines. Graphic characters other than the graphic characters provided by the G0 set and the G1 set can be obtained from this character set. A specific graphic character should be assigned to each position or it should be clearly stated that the position is not used. If the G2 set is a character set consisting of 94 characters, characters should not be assigned to positions 10/00 and 15/15. The characters of the G2 set should be called by the single shift function SS2 or the locked shift function LS2R. a. When SS2 is called, each character is represented by the bit group of SS2 and the bit group that follows it. If the G2 set is a character set consisting of 94 characters, the bit group that follows it The byte group is in the range of 02/01 to 07/14; or the G2 set is a character set consisting of 96 characters, then the next byte group is in the range of 02/00 to 07/15. b. When the G2 set is a character set consisting of 94 characters, then the characters of the G2 set are represented by the byte group 10/01 to 15/14, and the G2 set is a character set consisting of 96 characters, then the characters of the G2 set are represented by the byte group 10/00 to 15/15. 7.9 G3 set || tt || G3 set is a character set consisting of 94 characters or 96 characters. From this character set: : you can get graphic characters other than those provided by G0, G1 and G2. Each position should be assigned a specific graphic character or it should be clearly stated that the position is not used. If G3 is a character set consisting of 94 characters, then positions 10/00 and 15:15 should not be assigned characters, and the characters of G3 should be used by the single shift function SS3 or the locked shift function LS3R. a. When called by SS3, each character is represented by a byte group of SS3 and a byte group immediately following it. If G3 is a character set consisting of 94 characters, then positions 10/00 and 15:15 should not be assigned characters, and the characters of G3 should be used by the single shift function SS3 or the locked shift function LS3R. b. When called by SS3, each character is represented by a byte group of SS3 and a byte group immediately following it. b. If the G3 set is a sub-set of 94 characters, the byte group immediately following it is a byte group in the range of 02/01 to 07/14; if the G3 set is a sub-set of 96 characters, the byte group immediately following it is a byte group in the range of 02/00 to 07/15. b. When the internal LS3R is called, if the G3 set is a sub-set of 94 characters, the characters of the G3 set are represented by byte groups 10/01 to 15/14; if the G3 set is a sub-set of 96 characters, the characters of the G3 set are represented by byte groups 10/ to 15/15. 7.10 Summary of the detailed description of the eight-bit code
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