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byte-order mark


'byte-order mark' can also refer to...

 

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(BOM)

The Unicode codepoint U+FEFF when occurring at the start of a file. Its purpose is to give file-reading software a means of determining which of several popular Unicode encoding schemes the file is using. Additionally, for some encodings it indicates whether the most- or least-significant byte comes first. If the software detects a byte pattern at the start of the file that represents this codepoint in a recognized encoding, it assumes that the rest of the file also uses this encoding. The file's content is considered to start at the position following the byte-order mark.

Subjects: Computing.


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