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What is UTF-16 used for?
UTF-16 (16- bit Unicode Transformation Format) is a standard method of encoding Unicode character data. Part of the Unicode Standard version 3.0 (and higher-numbered versions), UTF-16 has the capacity to encode all currently defined Unicode characters.
Is a 16-bit encoding?
UTF-16 (16-bit Unicode Transformation Format) is a character encoding capable of encoding all 1,112,064 valid character code points of Unicode (in fact this number of code points is dictated by the design of UTF-16). The encoding is variable-length, as code points are encoded with one or two 16-bit code units.
Does UTF-16 support all languages?
A Unicode-based encoding such as UTF-8 can support many languages and can accommodate pages and forms in any mixture of those languages. There are three different Unicode character encodings: UTF-8, UTF-16 and UTF-32. Of these three, only UTF-8 should be used for Web content.
How many characters can UTF-16 represent?
The first 16-bit value is encoded in the range from 0xD800 to 0xDBFF. The second 16-bit value is encoded in the range from 0xDC00 to 0xDFFF. With supplementary characters, UTF-16 character codes can represent more than one million characters. Without supplementary characters, only 65,536 characters can be represented.
Why is UTF-16 harmful compared to UTF 8?
The only way in which UTF-16 can be considered to be harmful as opposed to, say, UTF-8 is that it has a different way of encoding code points outside the BMP (as a pair of surrogates). If code is wishing to access or iterate by code point, that means it needs to be aware of the difference.
When to use a BOM in UTF-16?
With “UTF-16” (when a “BE” or “LE” disambiguation is not used in the format name) the definition allows files to be marked as either big endian or little endian. This is done with something called the “Byte Order Mark” (BOM) in the first two bytes of the file: The existence of the BOM gives options to the writer of a file.
How is UTF-16 used to encode 63K characters?
A: UTF-16 uses a single 16-bit code unit to encode the most common 63K characters, and a pair of 16-bit code units, called surrogates, to encode the 1M less commonly used characters in Unicode. Originally, Unicode was designed as a pure 16-bit encoding, aimed at representing all modern scripts.
Are there compression schemes for UTF 8 and UTF 16?
A: Yes, there are several possible representations of Unicode data, including UTF-8, UTF-16 and UTF-32. In addition, there are compression transformations such as the one described in the UTS #6: A Standard Compression Scheme for Unicode (SCSU).