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ISO 2047

From Wikipedia, the free encyclopedia
Published standard
Early symbols assigned to the 32 control characters, space and delete characters. (ISO 2047, MIL-STD-188-100, 1972)

ISO 2047 (Information processing – Graphical representations for the control characters of the 7-bit coded character set) is a standard for graphical representation of thecontrol 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] The graphics and two-letter codes are essentially unchanged from the 1968 European standardECMA-17[2] and the 1973 American standard ANSI X3.32-1973.[3] It became an ISO standard in 1975.[1] It is also standardized as GB/T 3911-1983 in China, as KS X 1010[4] in Korea (formerly KS C 5713), and was enacted in Japan as "graphical representation of information exchange capabilities for character" JIS X 0209:1976 (former JIS C 6227) (abolished January 20, 2010).

While theISO/IEC 646 three-letter abbreviations (such as "ESC"), orcaret notation (such as "^[") are still in use, the graphical symbols of ISO 2047 are considered outdated and rare.[5]

Character table

[edit]
Code
(hex)		Common
abbreviation		NameSymbol[1][2][6][7][8]2-letter
abbreviation
00NULNull⎕U+2395NU
01TC1, SOHStart of Heading⌈U+2308SH
02TC2, STXStart of Text⊥U+22A5SX
03TC3, ETXEnd of Text⌋U+230BEX
04TC4, EOTEnd of Transmission⌁U+2301[9]ET
05TC5, ENQEnquiry⊠[a]U+22A0EQ
06TC6, ACKAcknowledge✓U+2713AK
07BELBell⍾U+237E[9]BL
08FE0, BSBackspace⤺—[b]BS
09FE1, HTHorizontal Tabulation⪫U+2AABHT
0AFE2, LFLine Feed≡U+2261LF
0BFE3, VTVertical Tabulation⩛U+2A5BVT
0CFE4, FFForm Feed↡U+21A1FF
0DFE5, CRCarriage Return⪪U+2AAACR
0ESOShift Out⊗U+2297SO
0FSIShift In⊙U+2299SI
10TC7, DLEData Link Escape⊟U+229FDL
11DC1,XON,CON[10]Device Control 1◷U+25F7D1
12DC2,RPT,[10] TAPE[c]Device Control 2◶U+25F6D2
13DC3,XOF, XOFFDevice Control 3◵U+25F5D3
14DC4,COF, KMC,[10]TAPE[c]Device Control 4◴U+25F4D4
15TC8, NAKNegative Acknowledge⍻U+237B[9]NK
16TC9, SYNSynchronization⎍U+238DSY
17TC10, ETBEnd of Transmission Block⊣U+22A3EB
18CANCancel⧖U+29D6CN
19EMEnd of Medium⍿U+237F[9]EM
1ASUBSubstitute Character␦U+2426[12]SB
1BESCEscape⊖U+2296EC
1CIS4, FSFile Separator◰U+25F0FS
1DIS3, GSGroup Separator◱U+25F1GS
1EIS2, RSRecord Separator◲U+25F2RS
1FIS1 USUnit Separator◳U+25F3US
20SPSpace△U+25B3SP
7FDELDelete▨—[d]DT

Notes

[edit]
  1. ^In ISO 2047, ✠ is the primary glyph and ⊠ is only a fallback, but ECMA-17 lists only ⊠.
  2. ^As a best-fit approximation ↖ could be used. Other defensible choices could be ⤺, ↰, ⮢, ⮪, ⮌ or ⮏.
  3. ^abOn the Teletype Model 33 TAPE andTAPE would control the tape punch, whereas XON and XOFF would control the reader. ENQ was labelled WRU for 'who are you?'[11]
  4. ^As a best-fit approximation ▨, 🮙 or ␥ could be used.

References

[edit]
  1. ^abc"ISO 2047:1975 Information processing – Graphical representations for the control characters of the 7-bit coded character set".ISO.Archived from the original on 2 August 2020. Retrieved13 April 2020.
  2. ^ab"ECMA-17, Graphic Representation of the Control Characters of the ECMA 7-Bit Coded Character Set for Information Interchange".Archived from the original on 2023-12-02. Retrieved2024-05-08. (withdrawn)
  3. ^"American National Standard – Graphic Representation of the Control Characters of American National Standard Code for Information Interchange".American National Standards Institute. 3 July 1973.
  4. ^"KS X 1010-2007 Graphical representations control characters for Information interchange". Archived fromthe original on April 10, 2022.
  5. ^Agim Çami,"Control characters in ASCII and Unicode"(PDF).Agim Çami – Computer Architecture web site. 1 July 2019.Archived(PDF) from the original on 6 October 2021. Retrieved5 August 2020.
  6. ^Michael P. Frank (14 September 2006)."A Proposed Set of Mnemonic Symbolic Glyphs for the Visual Representation of C0 Controls and Other Nonprintable ASCII Characters"(PDF).Archived(PDF) from the original on 2 July 2023. Retrieved8 May 2024. (mirror)
  7. ^"Information Representation". 28 August 2016.Archived from the original on 1 August 2020. Retrieved26 April 2020. – This is the site cited by Michael P. Frank
  8. ^"Information Technology - Irish 7-bit coded character sets". 13 December 1995.Archived from the original on 8 May 2024. Retrieved26 April 2020. – Note that in this article the glyphs forENQ,BS,CR andSO are anomalous, possibly to accommodate the low resolution.
  9. ^abcdSpecifically cited in"Miscellaneous Technical. Range: 2300–23FF"(PDF).The Unicode Standard.Archived(PDF) from the original on 2019-12-30.
  10. ^abcComité Consultatif International Télégraphique et Téléphonique (31 July 1987).Primary Control Set of Data Syntax II of CCITT Rec. T.101(PDF). ITSCJ/IPSJ.ISO-IR-134.
    "Terminals for Telematic Services, International Interworking for Videotex Services". International Telecommunication Union. 11 November 1994. A.3.9 General control characters.Archived from the original on 2 July 2023. Retrieved8 May 2024.
  11. ^Robert McConnell; James Haynes; Richard Warren (December 2002)."Understanding ASCII Codes".NADCOMM.Archived from the original on 2023-09-26. Retrieved2024-05-08.
  12. ^Specifically cited in"Control Pictures. Range: 2400–243F"(PDF).The Unicode Standard.Archived(PDF) from the original on 2019-01-18.

External links

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