![]() (Oracle9 i Database and later versions only) Oracle8 i Database release 8.1.7 and later: 3.0 Oracle Database release 8.0 through Oracle8 i Release 8.1.6: 2.1 Table 6-1 Unicode Character Sets Supported by Oracle Database Character Set Characters with code points U+10000 to U+10FFFF are called supplementary characters.Īdding supplementary characters has increased the complexity of the Unicode 16-bit, fixed-width encoding form however, this is still far less complex than managing hundreds of legacy encodings used before Unicode. Characters with code points U+0000 to U+FFFF are called Basic Multilingual Plane characters. The code point value is left-padded with non-significant zeros to the minimum length of four. The Unicode notation for representing character code points is the prefix "U+" followed by the hexadecimal code point value. These numbers are called code points, and are in the range 0 to 10FFFF hexadecimal. ![]() The current definition of the Unicode Standard assigns a number to each character defined in the standard. However, more characters need to be supported, especially additional CJK ideographs that are important for the Chinese, Japanese, and Korean markets. This enabled 65,536 characters to be represented. The first version of the Unicode Standard was a 16-bit, fixed-width encoding that used two bytes to encode each character. Since then, incremental improvements have been made in each release to synchronize the support with the new published version of the standard. Oracle Database introduced the Unicode Standard character encoding as the now obsolete database character set AL24UTFFSS in Oracle Database 7. It is also synchronized with the ISO/IEC 10646 standard. The Unicode Standard is required by other standards such as XML, Java, JavaScript, LDAP, and WML. Many operating systems and browsers now support the standard. The Unicode Standard has been adopted by many software and hardware vendors. Bi-directional behavior, word breaking, and line breaking are examples of such complex processing. It also defines a number of character properties and processing rules that help implement complex multilingual text processing correctly and consistently. It provides a unique code value for every character, regardless of the platform, program, or language. The Unicode Standard, which is now in wide use, meets all of the requirements and capabilities of a global character set. Support multilingual users and organizations ![]() The Internet has changed how companies do business, with an emphasis on the global market that has made a universal character set a major requirement.Ī global character set needs to fulfill the following conditions:īe simple enough that a single implementation of an application is sufficient for worldwide useĪ global character set should also have the following capabilities: ![]() The need for this became even greater with the development of the World Wide Web in the mid-1990s. To overcome the limitations of existing character encodings, several organizations began working on the creation of a global character set in the late 1980s. The Unicode Standard is a character encoding system that defines every character in most of the spoken languages in the world.
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