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The byte-order mark (BOM) is a particular usage of the special Unicode character code, U+FEFF ZERO WIDTH NO-BREAK SPACE, whose appearance as a magic number at the start of a text stream can signal several things to a program reading the text: [1] the byte order, or endianness, of the text stream in the cases of 16-bit and 32-bit encodings;
UTF-8 byte order mark, commonly seen in text files. [28] [29] [30] FF FE: ÿþ: 0 txt others: UTF-16LE byte order mark, commonly seen in text files. [28] [29] [30] FE FF: þÿ: 0 txt others: UTF-16BE byte order mark, commonly seen in text files. [28] [29] [30] FF FE 00 00: ÿþ␀␀ 0 txt others: UTF-32LE byte order mark for text [28] [30] 00 ...
A Unicode character is assigned a unique Name (na). [1] The name is composed of uppercase letters A–Z, digits 0–9, hyphen-minus and space.Some sequences are excluded: names beginning with a space or hyphen, names ending with a space or hyphen, repeated spaces or hyphens, and space after hyphen are not allowed.
"II" is for Intel, which uses little endian byte ordering, so the magic number is 49 49 2A 00. "MM" is for Motorola, which uses big endian byte ordering, so the magic number is 4D 4D 00 2A. Unicode text files encoded in UTF-16 often start with the Byte Order Mark to detect endianness (FE FF for big endian and FF FE for little
For example, the code point U+00F7 ... The UCS-2 and UTF-16 encodings specify the Unicode byte order mark ... Recent versions of the Python programming language ...
BOM—Byte Order Mark; BOOTP—Bootstrap Protocol; BPDU—Bridge Protocol Data Unit; BPEL—Business Process Execution Language; BPL—Broadband over Power Lines; BPM—Business Process Management; BPM—Business Process Modeling; bps—bits per second; BRM—Business Reference Model; BRMS—Business Rule Management System; BRR—Business ...
To assist in recognizing the byte order of code units, UTF-16 allows a byte order mark (BOM), a code point with the value U+FEFF, to precede the first actual coded value. [c] (U+FEFF is the invisible zero-width non-breaking space/ZWNBSP character).
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 ...