U+0005 Enquiry *
U+0005 was added in Unicode version 1.1 in 1993. It belongs to the block Basic Latin in the Basic Multilingual Plane.
This character is a Control and is commonly used, that is, in no specific script. The character is also known as ENQUIRY.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Boundary Neutral. When changing direction it is not mirrored. U+0005 prohibits a line break before it.
The Wikipedia has the following information about this codepoint:
In computer communications, enquiry is a transmission-control character that requests a response from the receiving station with which a connection has been set up. It represents a signal intended to trigger a response at the receiving end, to see whether it is still present. The response, an answer-back code to the terminal that transmitted the WRU (who are you) signal, may include station identification, the type of equipment in service, and the status of the remote station.
Some teleprinters had a "programmable" drum, which could hold a 20- or 22-character message. The message was encoded on the drum by breaking tabs off the drum. This sequence could be transmitted upon receipt of an enquiry signal, if enabled, or by pressing the "Here is" key on the keyboard.
The 5-bit ITA2 has an enquiry character, as do the later ASCII and EBCDIC.
In the 1960s, DEC routinely disabled the answerback feature on Teletype Model 33 terminals because it interfered with the use of the paper-tape reader and punch for binary data. However, the DEC VT100 terminals from 1978 responded to enquiry with a user-configurable answerback message, as did its successors.
Representations
| System | Representation |
|---|---|
| Nº | 5 |
| UTF-8 | 05 |
| UTF-16 | 00 05 |
| UTF-32 | 00 00 00 05 |
| URL-Quoted | %05 |
| HTML hex reference |  |
| Wrong windows-1252 Mojibake | â… |
| Caret Notation | ^E |
| control | ENQUIRY |
| abbreviation | ENQ |
| alias | ENQUIRY |
| Encoding: ASCII (hex bytes) | 05 |
| Encoding: BIG5 (hex bytes) | 05 |
| Encoding: BIG5HKSCS (hex bytes) | 05 |
| Encoding: CP037 (hex bytes) | 2D |
| Encoding: CP273 (hex bytes) | 2D |
| Encoding: CP424 (hex bytes) | 2D |
| Encoding: CP437 (hex bytes) | 05 |
| Encoding: CP500 (hex bytes) | 2D |
| Encoding: CP720 (hex bytes) | 05 |
| Encoding: CP737 (hex bytes) | 05 |
| Encoding: CP775 (hex bytes) | 05 |
| Encoding: CP850 (hex bytes) | 05 |
| Encoding: CP852 (hex bytes) | 05 |
| Encoding: CP855 (hex bytes) | 05 |
| Encoding: CP856 (hex bytes) | 05 |
| Encoding: CP857 (hex bytes) | 05 |
| Encoding: CP858 (hex bytes) | 05 |
| Encoding: CP860 (hex bytes) | 05 |
| Encoding: CP861 (hex bytes) | 05 |
| Encoding: CP862 (hex bytes) | 05 |
| Encoding: CP863 (hex bytes) | 05 |
| Encoding: CP864 (hex bytes) | 05 |
| Encoding: CP865 (hex bytes) | 05 |
| Encoding: CP866 (hex bytes) | 05 |
| Encoding: CP869 (hex bytes) | 05 |
| Encoding: CP874 (hex bytes) | 05 |
| Encoding: CP875 (hex bytes) | 2D |
| Encoding: CP932 (hex bytes) | 05 |
| Encoding: CP949 (hex bytes) | 05 |
| Encoding: CP950 (hex bytes) | 05 |
| Encoding: CP1006 (hex bytes) | 05 |
| Encoding: CP1026 (hex bytes) | 2D |
| Encoding: CP1125 (hex bytes) | 05 |
| Encoding: CP1140 (hex bytes) | 2D |
| Encoding: CP1250 (hex bytes) | 05 |
| Encoding: CP1251 (hex bytes) | 05 |
| Encoding: CP1252 (hex bytes) | 05 |
| Encoding: CP1253 (hex bytes) | 05 |
| Encoding: CP1254 (hex bytes) | 05 |
| Encoding: CP1255 (hex bytes) | 05 |
| Encoding: CP1256 (hex bytes) | 05 |
| Encoding: CP1257 (hex bytes) | 05 |
| Encoding: CP1258 (hex bytes) | 05 |
| Encoding: EUC_JP (hex bytes) | 05 |
| Encoding: EUC_JIS_2004 (hex bytes) | 05 |
| Encoding: EUC_JISX0213 (hex bytes) | 05 |
| Encoding: EUC_KR (hex bytes) | 05 |
| Encoding: GB2312 (hex bytes) | 05 |
| Encoding: GBK (hex bytes) | 05 |
| Encoding: GB18030 (hex bytes) | 05 |
| Encoding: HZ (hex bytes) | 05 |
| Encoding: ISO2022_JP (hex bytes) | 05 |
| Encoding: ISO2022_JP_1 (hex bytes) | 05 |
| Encoding: ISO2022_JP_2 (hex bytes) | 05 |
| Encoding: ISO2022_JP_2004 (hex bytes) | 05 |
| Encoding: ISO2022_JP_3 (hex bytes) | 05 |
| Encoding: ISO2022_JP_EXT (hex bytes) | 05 |
| Encoding: ISO2022_KR (hex bytes) | 05 |
| Encoding: LATIN_1 (hex bytes) | 05 |
| Encoding: ISO8859_2 (hex bytes) | 05 |
| Encoding: ISO8859_3 (hex bytes) | 05 |
| Encoding: ISO8859_4 (hex bytes) | 05 |
| Encoding: ISO8859_5 (hex bytes) | 05 |
| Encoding: ISO8859_6 (hex bytes) | 05 |
| Encoding: ISO8859_7 (hex bytes) | 05 |
| Encoding: ISO8859_8 (hex bytes) | 05 |
| Encoding: ISO8859_9 (hex bytes) | 05 |
| Encoding: ISO8859_10 (hex bytes) | 05 |
| Encoding: ISO8859_11 (hex bytes) | 05 |
| Encoding: ISO8859_13 (hex bytes) | 05 |
| Encoding: ISO8859_14 (hex bytes) | 05 |
| Encoding: ISO8859_15 (hex bytes) | 05 |
| Encoding: ISO8859_16 (hex bytes) | 05 |
| Encoding: JOHAB (hex bytes) | 05 |
| Encoding: KOI8_R (hex bytes) | 05 |
| Encoding: KOI8_T (hex bytes) | 05 |
| Encoding: KOI8_U (hex bytes) | 05 |
| Encoding: KZ1048 (hex bytes) | 05 |
| Encoding: MAC_CYRILLIC (hex bytes) | 05 |
| Encoding: MAC_GREEK (hex bytes) | 05 |
| Encoding: MAC_ICELAND (hex bytes) | 05 |
| Encoding: MAC_LATIN2 (hex bytes) | 05 |
| Encoding: MAC_ROMAN (hex bytes) | 05 |
| Encoding: MAC_TURKISH (hex bytes) | 05 |
| Encoding: PTCP154 (hex bytes) | 05 |
| Encoding: SHIFT_JIS (hex bytes) | 05 |
| Encoding: SHIFT_JIS_2004 (hex bytes) | 05 |
| Encoding: SHIFT_JISX0213 (hex bytes) | 05 |
| Encoding: CP037 (hex bytes) | 2D |
| Encoding: CP1025 (hex bytes) | 2D |
| Encoding: CP1047 (hex bytes) | 2D |
| Encoding: CP1097 (hex bytes) | 2D |
| Encoding: CP1112 (hex bytes) | 2D |
| Encoding: CP1122 (hex bytes) | 2D |
| Encoding: CP1123 (hex bytes) | 2D |
| Encoding: CP1140 (hex bytes) | 2D |
| Encoding: CP1141 (hex bytes) | 2D |
| Encoding: CP1142 (hex bytes) | 2D |
| Encoding: CP1143 (hex bytes) | 2D |
| Encoding: CP1144 (hex bytes) | 2D |
| Encoding: CP1145 (hex bytes) | 2D |
| Encoding: CP1146 (hex bytes) | 2D |
| Encoding: CP1147 (hex bytes) | 2D |
| Encoding: CP1148 (hex bytes) | 2D |
| Encoding: CP1148MS (hex bytes) | 2D |
| Encoding: CP1149 (hex bytes) | 2D |
| Encoding: CP273 (hex bytes) | 2D |
| Encoding: CP277 (hex bytes) | 2D |
| Encoding: CP278 (hex bytes) | 2D |
| Encoding: CP280 (hex bytes) | 2D |
| Encoding: CP284 (hex bytes) | 2D |
| Encoding: CP285 (hex bytes) | 2D |
| Encoding: CP290 (hex bytes) | 2D |
| Encoding: CP297 (hex bytes) | 2D |
| Encoding: CP420 (hex bytes) | 2D |
| Encoding: CP424 (hex bytes) | 2D |
| Encoding: CP500 (hex bytes) | 2D |
| Encoding: CP500MS (hex bytes) | 2D |
| Encoding: CP833 (hex bytes) | 2D |
| Encoding: CP838 (hex bytes) | 2D |
| Encoding: CP870 (hex bytes) | 2D |
| Encoding: CP871 (hex bytes) | 2D |
| Encoding: CP875 (hex bytes) | 2D |
| Adobe Glyph List | controlENQ |
| digraph | EQ |
Elsewhere
Complete Record
| Property | Value |
|---|---|
| 1.1 (1993) | |
| — | |
| ENQUIRY | |
| Basic Latin | |
| Control | |
| Common | |
| Boundary Neutral | |
| Not Reordered | |
| none | |
| Enquiry* | |
| ✘ | |
| Enquiry* | |
| Enquiry* | |
| ✘ | |
| Enquiry* | |
| Enquiry* | |
| Enquiry* | |
| Enquiry* | |
| Enquiry* | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Enquiry* | |
| Control | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| 0 | |
| 0 | |
| 0 | |
| ✘ | |
| None | |
| — | |
| NA | |
| Other | |
| — | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Yes | |
| Yes | |
| Enquiry* | |
| Yes | |
| Enquiry* | |
| Yes | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Other | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Other | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Enquiry* | |
| None | |
| neutral | |
| Not Applicable | |
| — | |
| No_Joining_Group | |
| Non Joining | |
| Combining Mark | |
| none | |
| not a number | |
| Enquiry* | |
| R |