ISO 2047
ISO 2047 (Information processing – Graphical representations for the control characters of the 7-bit coded character set) is a standard for graphical representation of the control characters for debugging purposes, such as may be found in the character generator of a computer terminal; it also establishes a two-letter abbreviation of each control character.[1] In addition, RFC 1345 "Character Mnemonics & Character Sets" is cited as the ISO 2047 two-letter abbreviation of the control character. ISO 2047, ECMA-17[2] in Europe, GB/T 3911-1983 in China, that corresponds to KS X 1010[3] in Korea (formerly KS C 5713) has been established as a standard. It was enacted "graphical representation of information exchange capabilities for character" JIS X 0209:1976 (former JIS C 6227) in Japan, and was abolished on January 20, 2010.
The ISO/IEC 646 three-letter abbreviation (such as "ESC"), or caret notation (such as "^[") are used much more often than this standard.
Character Table
Code (hex) |
Common abbreviation |
Name | Symbol[1][2][4][5][6] | 2-letter abbreviation | |
---|---|---|---|---|---|
00 | NUL | Null | ⎕ | U+2395 | NU |
01 | TC₁, SOH | Start of Heading | ⌈ | U+2308 | SH |
02 | TC₂, STX | Start of Text | ⊥ | U+22A5 | SX |
03 | TC₃, ETX | End of Text | ⌋ | U+230B | EX |
04 | TC₄, EOT | End of Transmission | ⌁ | U+2301[7] | ET |
05 | TC₅, ENQ | Enquiry | ⊠[8] | U+22A0 | EQ |
06 | TC₆, ACK | Acknowledge | ✓ | U+2713 | AK |
07 | BEL | Bell | ⍾ | U+237E[7] | BL |
08 | FE₀, BS | Backspace | ⤺ | —[9] | BS |
09 | FE₁, HT | Horizontal Tabulation | ⪫ | U+2AAB | HT |
0A | FE₂, LF | Line Feed | ≡ | U+2261 | LF |
0B | FE₃, VT | Vertical Tabulation | ⩛ | U+2A5B | VT |
0C | FE₄, FF | Form Feed | ↡ | U+21A1 | FF |
0D | FE₅, CR | Carriage Return | ⪪ | U+2AAA | CR |
0E | SO | Shift Out | ⊗ | U+2297 | SO |
0F | SI | Shift In | ⊙ | U+2299 | SI |
10 | TC₇, DLE | Data Link Escape | ⊟ | U+229F | DL |
11 | DC₁ | Device Control 1 | ◷ | U+25F7 | D1 |
12 | DC₂ | Device Control 2 | ◶ | U+25F6 | D2 |
13 | DC₃ | Device Control 3 | ◵ | U+25F5 | D3 |
14 | DC₄ | Device Control 4 | ◴ | U+25F4 | D4 |
15 | TC₈, NAK | Negative Acknowledge | ⍻ | U+237B[7] | NK |
16 | TC₉, SYN | Synchronization | ⎍ | U+238D | SY |
17 | TC₁₀, ETB | End of Transmission Block | ⊣ | U+22A3 | EB |
18 | CAN | Cancel | ⧖ | U+29D6 | CN |
19 | EM | End of Medium | ⍿ | U+237F[7] | EM |
1A | SUB | Substitute Character | ␦ | U+2426[10] | SB |
1B | ESC | Escape | ⊖ | U+2296 | EC |
1C | IS₄, FS | File Separator | ◰ | U+25F0 | FS |
1D | IS₃, GS | Group Separator | ◱ | U+25F1 | GS |
1E | IS₂, RS | Record Separator | ◲ | U+25F2 | RS |
1F | IS₁ US | Unit Separator | ◳ | U+25F3 | US |
20 | SP | Space | △ | U+25B3 | SP |
7F | DEL | Delete | —[11] | DT |
References
- "ISO 2047:1975 Information processing – Graphical representations for the control characters of the 7-bit coded character set". ISO. ISO. Retrieved 13 April 2020.
- ECMA-17, Graphic Representation of the Control Characters of the ECMA 7-Bit Coded Character Set for Information Interchange (withdrawn)
- KS X 1010-2007 Graphical representations control characters for Information interchange
- Michael P. Frank, A Proposed Set of Mnemonic Symbolic Glyphs for the Visual Representation of C0 Controls and Other Nonprintable ASCII Characters, 14 September 2006 (mirror)
- Information Representation, 28 August 2016 – This is the site cited by Michael P. Frank
- Information Technology - Irish 7-bit coded character sets, 13 December 1995 – Note that in this article the glyphs for ENQ, BS, CR and SO are anomalous, possibly to accommodate the low resolution.
- Specifically cited in The Unicode Standard, Version 6.2. Miscellaneous Technical. Range: 2300–23FF.
- In ISO 2047, ✠ is the primary glyph and ⊠ is only a fallback, but ECMA-17 lists only ⊠.
- As a best-fit approximation ↖ could be used. Other defensible choices could be ⤺, ↰, ⮢, ⮪, ⮌ or ⮏.
- Specifically cited in The Unicode Standard, Version 6.2. Control Pictures. Range: 2400–243F.
- As a best-fit approximation ▨, 🮙 or ␥ could be used.