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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;
It may though require the user to change options from the normal settings, or may require a BOM (byte-order mark) as the first character to read the file. Examples of software supporting UTF-8 include Microsoft Word, [34] [35] [36] Microsoft Excel (2016 and later), [37] [38] Google Drive, LibreOffice and most databases.
Gulliver's Travels by Jonathan Swift, the novel from which the term was coined. In computing, endianness is the order in which bytes within a word of digital data are transmitted over a data communication medium or addressed (by rising addresses) in computer memory, counting only byte significance compared to earliness.
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 00 FE FF ␀␀þÿ: 0 txt others: UTF-32BE byte order mark for text [28] [30] 2B 2F 76 38 2B 2F 76 39 2B 2F 76 2B 2B 2F 76 2F +/v8 +/v9 +/v+ +/v/ 0 UTF-7 byte order mark for text [31] [30 ...
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).
A byte order mark (BOM) is an optional special byte sequence at the very start of a stream or file that, without being data itself, indicates the encoding used for the data that follows; it can be used in the absence of metadata that denotes the encoding. For a given encoding scheme, it's that scheme's representation of Unicode code point U ...
Presentation: A corrected name is preceded by symbol ※ (the reference mark). 4. Alternate For widely used alternate name for a character. There is 1 such alias. Example: U+FEFF ZERO WIDTH NO-BREAK SPACE has alternate BYTE ORDER MARK. Presentation: listed in character charts description. 5. Figment
A byte order mark (BOM) within the first three bytes of the document; The HTTP Content-Type or other transport layer information; Analysis of the document bytes looking for specific sequences or ranges of byte values, [5] and other tentative detection mechanisms. Characters outside of the printable ASCII range (32 to 126) usually appear ...