Arabic Presentation Forms-B

Arabic Presentation Forms-B is a Unicode block encoding spacing forms of Arabic diacritics, and contextual letter forms. The special codepoint ZWNBSP (zero width no-break space) is also here, which is only meant for a byte order mark (that may precede text, Arabic or not, or be absent) The byte-order mark is very useful in detecting endianness in UTF-16, because when it is at the start of UTF-16 data and the interpreter reads the first character as the noncharacter U+FFFE (see Specials), the file is clearly interpreted with the wrong endianness.

Source: Wikipedia — Arabic Presentation Forms-B (CC BY-SA 4.0)

Arabic Presentation Forms-B

Arabic Presentation Forms-B is a Unicode block encoding spacing forms of Arabic diacritics, and contextual letter forms. The special codepoint ZWNBSP (zero width no-break space) is also here, which is only meant for a byte order mark (that may precede text, Arabic or not, or be absent) The byte-order mark is very useful in detecting endianness in UTF-16, because when it is at the start of UTF-16 data and the interpreter reads the first character as the noncharacter U+FFFE (see Specials), the file is clearly interpreted with the wrong endianness.

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Source: Wikipedia "Arabic Presentation Forms-B" · CC BY-SA 4.0

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