U+2405 Symbol for Enquiry
U+2405 was added in Unicode version 1.1 in 1993. It belongs to the block
This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+2405 forms with similar adjacent characters prevents a line break inside it.
Wikipedia ma następujące informacje na temat tej współrzędnej kodowej:
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.
Reprezentacje
System | Reprezentacje |
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Nº | 9221 |
UTF-8 | E2 90 85 |
UTF-16 | 24 05 |
UTF-32 | 00 00 24 05 |
Adres URL cytowany | %E2%90%85 |
HTML hex reference | ␅ |
Błędne windows-1252 Mojibake | â… |
Gdzie indziej
Kompletny opis
Właściwość | Wartość |
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1.1 (1993) | |
SYMBOL FOR ENQUIRY | |
GRAPHIC FOR ENQUIRY | |
Control Pictures | |
Other Symbol | |
Common | |
Other Neutral | |
Not Reordered | |
none | |
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Any | |
✔ | |
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0 | |
0 | |
0 | |
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None | |
— | |
NA | |
Other | |
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✘ | |
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Yes | |
Yes | |
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Yes | |
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Yes | |
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Other | |
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Other | |
✘ | |
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neutral | |
Not Applicable | |
— | |
No_Joining_Group | |
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not a number | |
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U |