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Although a BOM could be used with UTF-32, this encoding is rarely used for transmission. Otherwise the same rules as for UTF-16 are applicable. The BOM for little-endian UTF-32 is the same pattern as a little-endian UTF-16 BOM followed by a UTF-16 NUL character, an unusual example of the BOM being the same pattern in two different encodings.
In some locales UTF-8N means UTF-8 without a byte-order mark (BOM), and in this case UTF-8 may imply there is a BOM. [76] [77] In Windows, UTF-8 is codepage 65001 [78] with the symbolic name CP_UTF8 in source code. In MySQL, UTF-8 is called utf8mb4, [79] while utf8 and utf8mb3 refer to the obsolete CESU-8 variant. [80]
The sentence that starts, “One reason the UTF-8 BOM is not recommended” does not imply that the Unicode standard recommends against using a BOM. It merely means that the Unicode standard does not recommend for using a BOM for UTF-8 and gives an example of why Unicode’s recommendation was formulated the way it is. The Unicode caution may ...
The same character converted to UTF-8 becomes the byte sequence EF BB BF. The Unicode Standard allows the BOM "can serve as a signature for UTF-8 encoded text where the character set is unmarked". [75] Some software developers have adopted it for other encodings, including UTF-8, in an attempt to distinguish UTF-8 from local 8-bit code pages.
The configuration is typically stored in a UTF-8 encoded text file: .editorconfig. Some tools allow saving their style preferences as an EditorConfig file. [8] Each line: May be blank (only whitespace characters; A comment that begins with ; or # A section header, which starts with a square bracket [, and ends with a square bracket ].
The Unicode Consortium and the ISO/IEC JTC 1/SC 2/WG 2 jointly collaborate on the list of the characters in the Universal Coded Character Set.The Universal Coded Character Set, most commonly called the Universal Character Set (abbr. UCS, official designation: ISO/IEC 10646), is an international standard to map characters, discrete symbols used in natural language, mathematics, music, and other ...
However, UTF-8 files may begin with the optional byte order mark (BOM); if the "exec" function specifically detects the bytes 0x23 and 0x21, then the presence of the BOM (0xEF 0xBB 0xBF) before the shebang will prevent the script interpreter from being executed.
Therefore the UTF-8 BOM is the primary reason we still have legacy character sets. Web pages in windows-1252 would display correctly if browsers displayed invalid UTF-8 by translating the individual bytes to the windows-1252 characters, and there would be NO reason for any charset and the default could still be UTF-8.