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The variable length character of UTF-16, combined with the fact that most characters are not variable length (so variable length is rarely tested), has led to many bugs in software, including in Windows itself. [6] UTF-16 is the only encoding (still) allowed on the web that is incompatible with 8-bit ASCII.
UTF-16 is popular because many APIs date to the time when Unicode was 16-bit fixed width (referred as UCS-2). However, using UTF-16 makes characters outside the Basic Multilingual Plane a special case which increases the risk of oversights related to their handling. That said, programs that mishandle surrogate pairs probably also have problems ...
The numbers in the names of the encodings indicate the number of bits per code unit (for UTF encodings) or the number of bytes per code unit (for UCS encodings and UTF-1). UTF-8 and UTF-16 are the most commonly used encodings. UCS-2 is an obsolete subset of UTF-16; UCS-4 and UTF-32 are functionally equivalent. UTF encodings include:
Download as PDF; Printable version; ... Official Unicode Consortium code chart (PDF) ... 1. ^ As of Unicode version 16.0: Mathematical Alphanumeric Symbols block
UTF-16 – Extends UCS-2 to cover the whole of Unicode with sequences of one or two 16-bit elements; GB 18030 – A full-Unicode variable-length code designed for compatibility with older Chinese multibyte encodings; Huffman coding – A technique for expressing more common characters using shorter bit strings than are used for less common ...
The Universal Coded Character Set (UCS, Unicode) is a standard set of characters defined by the international standard ISO/IEC 10646, Information technology — Universal Coded Character Set (UCS) (plus amendments to that standard), which is the basis of many character encodings, improving as characters from previously unrepresented writing systems are added.
Download as PDF; Printable version; ... Code chart ∣ Web page ... 1. ^ As of Unicode version 16.0: Emoji
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 ...