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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.
HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the ...
The Unicode Consortium together with the ISO have developed a shared repertoire following the initial publication of The Unicode Standard: Unicode and the ISO's Universal Coded Character Set (UCS) use identical character names and code points. However, the Unicode versions do differ from their ISO equivalents in two significant ways.
The Unicode Standard, Version 16.0.0 (2024) [84] They supersede the definitions given in the following obsolete works: The Unicode Standard, Version 2.0, Appendix A (1996) ISO/IEC 10646-1:1993 Amendment 2 / Annex R (1996) RFC 2044 (1996) RFC 2279 (1998) The Unicode Standard, Version 3.0, §2.3 (2000) plus Corrigendum #1 : UTF-8 Shortest Form (2000)
Note: Range was initially part of the Private Use Area in Unicode 1.0.0, [1] and removed from it in Unicode 1.0.1. One character was moved from the Hebrew block to the Alphabetic Presentation Forms block in version 1.0.1 during the process of unifying with ISO 10646 .
The Egyptian Hieroglyphs Unicode block has 94 standardized variants defined to specify rotated signs: [3] [4]. Variation selector-1 (VS1) (U+FE00) can be used to rotate 40 signs by 90°:
The Unicode Consortium (legally Unicode, Inc.) is a 501(c)(3) non-profit organization incorporated and based in Mountain View, California, U.S. [4] Its primary purpose is to maintain and publish the Unicode Standard which was developed with the intention of replacing existing character encoding schemes that are limited in size and scope, and are incompatible with multilingual environments.
The Latin-1 Supplement (also called C1 Controls and Latin-1 Supplement) is the second Unicode block in the Unicode standard. It encodes the upper range of ISO 8859-1: 80 (U+0080) - FF (U+00FF).