Recunoaștere negativă
Semnificația simbolului
The Negative Acknowledgement symbol was used in computer terminals, printers, text processing systems, and telecommunication equipment to control data flow and ensure the reliable transmission of information.
It tended to indicate an error in data transmission or a problem with receiving information. In communication protocols, after receiving the NAK symbol, the data sender was required to repeat the previous transmission to correct any errors or data loss. If the data was transmitted correctly, the opposite symbol was sent ( ).
As for modern computer systems and applications, the U+0015 symbol is rarely used there, since other mechanisms and protocols are employed to ensure the reliability of data transmission and error handling.
Like many other control symbols, this one has no visible representation and doesn't occupy a lot of space on screen or in typed text. However, there is a separate symbol in Control Pictures 2400–243F representing the graphical image of the Negative Acknowledge symbol as the abbreviation NAK — ␕ .
Simbolul „Recunoaștere negativă” este inclus în subblocul „Controale C0« al blocului »Basic Latin și a fost aprobat ca parte a versiunii Unicode 1.1 în anul 1993.
Sinonime
NAK.
| Nume Unicode | Negative Acknowledge |
| Număr Unicode | |
| Plan | 0: Principalul plan multilingv |
| Bloc Unicode | Basic Latin |
| Subbloc Unicode | Controale C0 |
| Versiunea Unicode | 1.1 (1993) |
| Scurtătură de tastatură | ^U |
| Tip de suport oglindă pereche (bidi) | None |
| Excluderea compoziției | No |
| Schimbarea cazului | 0015 |
| Simplă schimbare de caz | 0015 |
| scripts | Common |
| Codificare | hex | dec (bytes) | dec | binary |
|---|---|---|---|---|
| UTF-8 | 15 | 21 | 21 | 00010101 |
| UTF-16BE | 00 15 | 0 21 | 21 | 00000000 00010101 |
| UTF-16LE | 15 00 | 21 0 | 5376 | 00010101 00000000 |
| UTF-32BE | 00 00 00 15 | 0 0 0 21 | 21 | 00000000 00000000 00000000 00010101 |
| UTF-32LE | 15 00 00 00 | 21 0 0 0 | 352321536 | 00010101 00000000 00000000 00000000 |
Copiază și lipește aceste coduri pentru a folosi personajul Recunoaștere negativă în textele pentru site-uri web, rețele sociale, mesagerie sau postări pe blog.
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