Start of Heading
Symbol Meaning
The Start of Heading symbol was used in teletype and other communication systems to indicate the beginning of a message title. A heading usually contains metadata such as sender and recipient addresses and is used to organize the transfer of information between devices.
In modern computer systems and applications, the use of the U+0001 symbol has become rare; its functions are often replaced by other methods of encoding metadata or structuring data.
Like other control characters, this symbol has no visual representation and does not occupy space on the screen or in print. The block Control Pictures2400–243F includes a separate symbol representing the graphic image of the header one. It's the abbreviation called SOH (Start of Heading) — ␁.
The symbol “Start of Heading” is included in the “C0 controls” subblock of the “Basic Latin” block and was approved as part of Unicode version 1.1 in 1993.
Synonyms
SOH.
| Unicode Name | Start of Heading |
| Unicode Number | |
| HTML Code | |
| CSS Code | |
| Plane | 0: Basic Multilingual Plane |
| Unicode Block | Basic Latin |
| Unicode Subblock | C0 controls |
| Unicode Version | 1.1 (1993) |
| Keyboard shortcut | ^A |
| Type of paired mirror bracket (bidi) | None |
| Composition Exclusion | No |
| Case change | 0001 |
| Simple case change | 0001 |
| scripts | Common |
| Encoding | hex | dec (bytes) | dec | binary |
|---|---|---|---|---|
| UTF-8 | 01 | 1 | 1 | 00000001 |
| UTF-16BE | 00 01 | 0 1 | 1 | 00000000 00000001 |
| UTF-16LE | 01 00 | 1 0 | 256 | 00000001 00000000 |
| UTF-32BE | 00 00 00 01 | 0 0 0 1 | 1 | 00000000 00000000 00000000 00000001 |
| UTF-32LE | 01 00 00 00 | 1 0 0 0 | 16777216 | 00000001 00000000 00000000 00000000 |