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Unicode Normalization
Unicode equivalence is the specification by the Unicode character (computing), character encoding standard that some sequences of code points represent essentially the same character. This feature was introduced in the standard to allow compatibility with pre-existing standard character sets, which often included similar or identical characters. Unicode provides two such notions, canonical form, canonical equivalence and compatibility. Code point sequences that are defined as canonically equivalent are assumed to have the same appearance and meaning when printed or displayed. For example, the code point followed by is defined by Unicode to be canonically equivalent to the single code point of the Spanish alphabet). Therefore, those sequences should be displayed in the same manner, should be treated in the same way by applications such as alphabetical order, alphabetizing names or string searching, searching, and may be substituted for each other. Similarly, each Hangul sylla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unicode
Unicode or ''The Unicode Standard'' or TUS is a character encoding standard maintained by the Unicode Consortium designed to support the use of text in all of the world's writing systems that can be digitized. Version 16.0 defines 154,998 Character (computing), characters and 168 script (Unicode), scripts used in various ordinary, literary, academic, and technical contexts. Unicode has largely supplanted the previous environment of a myriad of incompatible character sets used within different locales and on different computer architectures. The entire repertoire of these sets, plus many additional characters, were merged into the single Unicode set. Unicode is used to encode the vast majority of text on the Internet, including most web pages, and relevant Unicode support has become a common consideration in contemporary software development. Unicode is ultimately capable of encoding more than 1.1 million characters. The Unicode character repertoire is synchronized with Univers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Language
Language is a structured system of communication that consists of grammar and vocabulary. It is the primary means by which humans convey meaning, both in spoken and signed language, signed forms, and may also be conveyed through writing system, writing. Human language is characterized by its cultural and historical diversity, with significant variations observed between cultures and across time. Human languages possess the properties of Productivity (linguistics), productivity and Displacement (linguistics), displacement, which enable the creation of an infinite number of sentences, and the ability to refer to objects, events, and ideas that are not immediately present in the discourse. The use of human language relies on social convention and is acquired through learning. Estimates of the number of human languages in the world vary between and . Precise estimates depend on an arbitrary distinction (dichotomy) established between languages and dialects. Natural languages are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Full-width
In CJK (Chinese, Japanese, and Korean) computing, graphic characters are traditionally classed into fullwidth and halfwidth characters. Unlike monospaced fonts, a halfwidth character occupies half the width of a fullwidth character, hence the name. ''Halfwidth and Fullwidth Forms'' is also the name of a Unicode block U+FF00–FFEF, provided so that older encodings containing both halfwidth and fullwidth characters can have lossless translation to and from Unicode. Rationale In the days of text mode computing, Western characters were normally laid out in a grid on the screen, often 80 columns by 24 or 25 lines. Each character was displayed as a small dot matrix, often about 8 pixels wide, and an SBCS (single-byte character set) was generally used to encode characters of Western languages. For aesthetic reasons and readability, it is preferable for Chinese characters to be approximately square-shaped, therefore twice as wide as these fixed-width SBCS characters. As these w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Half-width Katakana
are katakana characters displayed compressed at half their normal width (a 1:2 aspect ratio), instead of the usual square (1:1) aspect ratio. For example, the usual (full-width) form of the katakana ''ka'' is カ while the half-width form is ｶ. Additionally, half-width hiragana is included in Unicode, and it is usable on Web or in e-books via Cascading Style Sheets, CSS's font-feature-settings: "hwid" 1 with PostScript fonts#Adobe-Japan1, Adobe-Japan1-6 based OpenType fonts. Finally, half-width kanji is usable on modern computers, and is used in some receipt printers, electric bulletin board and old computers. Half-width kana were used in the early days of Japanese computing, to allow Japanese characters to be displayed on the same grid as monospaced fonts of Latin characters. Half-width kanji were not used. Half-width kana characters are not generally used today, but find some use in specific settings, such as cash register displays, on shop receipts, Japanese digital television ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Typographic Ligature
In writing and typography, a ligature occurs where two or more graphemes or letters are joined to form a single glyph. Examples are the characters and used in English and French, in which the letters and are joined for the first ligature and the letters and are joined for the second ligature. For stylistic and legibility reasons, and are often merged to create (where the tittle on the merges with the hood of the ); the same is true of and to create . The common ampersand, , developed from a ligature in which the handwritten Latin letters and (spelling , Latin for 'and') were combined. History The earliest known script Sumerian cuneiform and Egyptian hieratic both include many cases of character combinations that gradually evolve from ligatures into separately recognizable characters. Other notable ligatures, such as the Brahmic abugidas and the Germanic bind rune, figure prominently throughout ancient manuscripts. These new glyphs emerge alongside the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Normal Forms
Database normalization is the process of structuring a relational database in accordance with a series of so-called '' normal forms'' in order to reduce data redundancy and improve data integrity. It was first proposed by British computer scientist Edgar F. Codd as part of his relational model. Normalization entails organizing the columns (attributes) and tables (relations) of a database to ensure that their dependencies are properly enforced by database integrity constraints. It is accomplished by applying some formal rules either by a process of ''synthesis'' (creating a new database design) or ''decomposition'' (improving an existing database design). Objectives A basic objective of the first normal form defined by Codd in 1970 was to permit data to be queried and manipulated using a "universal data sub-language" grounded in first-order logic. An example of such a language is SQL, though it is one that Codd regarded as seriously flawed. The objectives of normaliza ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precomposed Character
A precomposed character (alternatively composite character or decomposable character) is a Unicode entity that can also be defined as a sequence of one or more other characters. A precomposed character may typically represent a letter with a diacritical mark, such as ''é'' (Latin small letter ''e'' with acute accent). Technically, ''é'' (U+00E9) is a character that can be decomposed into an equivalent string of the base letter ''e'' (U+0065) and combining acute accent (U+0301). Similarly, ligatures are precompositions of their constituent letters or graphemes. Precomposed characters are the legacy solution for representing many special letters in various character sets. In Unicode, they are included primarily to aid computer systems with incomplete Unicode support, where equivalent decomposed characters may render incorrectly. Comparing precomposed and decomposed characters In the following example, there is a common Swedish surname Åström written in the two alterna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dakuten
The , colloquially , is a diacritic most often used in the Japanese kana syllabaries to indicate that the consonant of a mora should be pronounced voiced, for instance, on sounds that have undergone rendaku (sequential voicing). The , colloquially , is a diacritic used with kana for morae pronounced with or to indicate that they should instead be pronounced with . Glyphs The ''dakuten'' resembles a quotation mark, while the ''handakuten'' is a small circle, similar to a degree sign, both placed at the top right corner of a kana character: * * * * * * Both the ''dakuten'' and ''handakuten'' glyphs are drawn identically in hiragana and katakana scripts. The combining characters are rarely used in full-width Japanese characters, as Unicode and all common multibyte Japanese encodings provide precomposed glyphs for all possible ''dakuten'' and ''handakuten'' character combinations in the standard hiragana and katakana ranges. However, combining characters are required i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Script
The modern Japanese writing system uses a combination of logographic kanji, which are adopted Chinese characters, and syllabic kana. Kana itself consists of a pair of syllabaries: hiragana, used primarily for native or naturalized Japanese words and grammatical elements; and katakana, used primarily for foreign words and names, loanwords, onomatopoeia, scientific names, and sometimes for emphasis. Almost all written Japanese sentences contain a mixture of kanji and kana. Because of this mixture of scripts, in addition to a large inventory of kanji characters, the Japanese writing system is considered to be one of the most complicated currently in use. Several thousand kanji characters are in regular use, which mostly originate from traditional Chinese characters. Others made in Japan are referred to as "Japanese kanji" (), also known as " urcountry's kanji" (). Each character has an intrinsic meaning (or range of meanings), and most have more than one pronunciation, the choic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Combining Character
In digital typography, combining characters are Character (computing), characters that are intended to modify other characters. The most common combining characters in the Latin script are the combining diacritic, diacritical marks (including combining accents). Unicode also contains many precomposed characters, so that in many cases it is possible to use both combining diacritics and precomposed characters, at the user's or application's choice. This leads to a requirement to perform Unicode normalization before comparing two Unicode strings and to carefully design encoding converters to correctly map all of the valid ways to represent a character in Unicode to a legacy encoding to avoid data loss. In Unicode, the main block of combining diacritics for European languages and the International Phonetic Alphabet is U+0300–U+036F. Combining diacritical marks are also present in many other blocks of Unicode characters. In Unicode, diacritics are always added after the main char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IJ (digraph)
IJ (lowercase ij; ; also encountered as Unicode compatibility characters IJ and ij) is a Digraph (orthography), digraph of the letters ''i'' and ''j''. Occurring in the Dutch language, it is sometimes considered a Ligature (writing), ligature, or a letter in itself. In most fonts that have a separate character for ''ij'', the two composing parts are not connected but are separate glyphs, which are sometimes slightly Kerning, kerned. An ''ij'' in written Dutch usually represents the diphthong , similar to the pronunciation of in "pay", and is preserved in such Dutch spellings as the place-name IJsselmeer. In standard Dutch and most Dutch dialects, there are two possible spellings for the diphthong : ''ij'' and ''ei'', with no clear usage rules. To distinguish between the two, the ''ij'' is referred to as the ("long ''ij''"), the ''ei'' as ("short ''ei''") or simply ''E – I''. In certain Dutch dialects (notably West Flemish and Zeelandic) and the Dutch Low Saxon dialects of Lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
