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Encyclopedia > Fullwidth form
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In CJK computing, graphic characters are traditionally classed into fullwidth (in Taiwan and Hong Kong: 全形; elsewhere: 全角) and halfwidth (in Taiwan and Hong Kong: 半形; elsewhere: 半角) characters. With fixed-width fonts (now called bi-width by Westerners), a halfwidth character occupy half the width of a fullwidth character, hence the name. CJK is a collective term for Chinese, Japanese, and Korean, which comprise the main East Asian languages. ... A graphic character in the ASCII code, is a character other than an alphanumeric character, intended to be written, printed, or otherwise displayed in a form that can be read by humans. ...


In the days of computer terminals and text mode computing, characters were normally laid out in a grid, often 80 columns by 24 or 25 columns. Each character would be represented by a small dot matrix, often about 8 pixels wide, and an SBCS is generally used to encode the characters. A computer terminal is an electronic or electromechanical hardware device used for entering data into, and displaying data from, a computer or a computing system. ... A text mode program communicates with the user by only displaying text and possibly a limited set of predefined semi-graphical characters, which allow to draw rudimentary boxes around portions of text, either to highlight the content or to simulate widget or control interface objects found in GUI programs. ... A dot matrix is an array of dots used to generate characters, symbols and images. ... A pixel (a portmanteau of picture element) is one of the many tiny dots that make up the representation of a picture in a computers memory. ...


For a number of practical and aesthetic reasons, Han characters would need to be twice as wide as these fixed-width SBCS characters. These "fullwidth characters" were typically encoded in a DBCS because of a practical reason (compatibility with off-the-shelf software), though some systems may use a variable-width or some other form of multi-byte encoding. Technical note: Due to technical limitations, some web browsers may not display some special characters in this article. ...


In Unicode, if a certain grapheme can be represented as either a fullwidth character or a halfwidth character, it is said to have both a fullwidth form and a halfwidth form Jump to: navigation, search In computing, Unicode provides an international standard which has the goal of providing the means to encode the text of every document people want to store on computers. ... A grapheme designates the atomic unit in written language. ...


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Talk:Bracket - Wikipedia, the free encyclopedia (1096 words)
There's also the "presentation form for vertical" versions (which include the other kinds of brackets, among other things), which are in the "CJK Compatibility Forms" Unicode block.
So, they're probably just "fullwidth form" variants of the more familiar angle brackets, for use in text consisting mostly of ideographs.
The "angle brackets" in the article appear to be the CJK ones which are fullwidth.
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