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euctw(5) [osf1 man page]

eucTW(5)							File Formats Manual							  eucTW(5)

eucTW - A character encoding system (codeset) for Traditional Chinese DESCRIPTION
The Taiwanese EUC (Extended UNIX Code), or eucTW, codeset consists of the following character sets: ASCII CNS 11643 (Plane 1 to Plane 16) Taiwanese EUC uses a combination of single-byte data and 2-byte data to represent ASCII characters, symbols, and ideographic characters. Because too many character planes were included, Taiwanese EUC uses different leading codes to designate different character planes. ASCII characters are represented in the form of single byte 7-bit data in Taiwanese EUC; that is, the most significant bit (MSB) of the byte that represents an ASCII character is always set off. For more information, refer to ascii(5). Although the standard Taiwanese EUC codeset includes all characters defined by the CNS 11643-1992 standard, the operating system's eucTW implementation currently supports the following: Characters defined in the first and second planes of CNS 11643 The EDPC Recommended Char- acter Set (refer to dechanyu(5) for more information) CNS 11643-1986 and DTSCS characters that have been remapped into the third and fourth character planes by the CNS 11643-1992 standard Characters that were added to CNS 11643-1986 by the CNS 11643-1992 standard are not supported. The characters that are defined in plane 1 and plane 2 of CNS 11643-1992 and that are the same as those defined in CNS 11643-1986 are as follows: --------------------------------------------------------------------- Character Plane Character Type Number of Characters --------------------------------------------------------------------- 1 Special characters 651 Control characters 33 Frequently-used characters 5401 2 Less frequently-used char- 7650 acters --------------------------------------------------------------------- The characters defined in plane 3 and plane 4 of CNS 11643-1992 are as follows: --------------------------------------------------------------------------- Character Plane Character Type Number of Characters --------------------------------------------------------------------------- 3 Rarely-used characters (EDPC Part I) 6148 4 Used for residency system, ISO 2nd edi- 7298 tion DIS 10646 Han characters, 171 EDPC Part II Characters --------------------------------------------------------------------------- The characters that have been remapped into the third and fourth character planes of CNS 11643-1992 as specified by the EDPC are as fol- lows: --------------------------------------------------------- EDPC Characters Character Plane Number of Characters --------------------------------------------------------- Part I Plane 3 6148 Part II Plane 4 171 --------------------------------------------------------- Taiwanese EUC Encoding Except for characters in the first plane of CNS 11643-1986, Taiwanese EUC makes use of a leading code (the 8-bit Single-Shift 2 control character (SS2) and an additional byte) to designate characters to a character plane. The position of a character on a plane is specified by two bytes. The first byte determines the character's row number and the second byte determines the character's column number. The MSB of both bytes is set on. The following table shows the encoding of Taiwanese EUC characters: ------------------------------------------------------- CNS 11643-1986 Code Plane Leading Code Code Range ------------------------------------------------------- 1 [nil] A1A1 - FEFE 2 SS2 A2 A1A1 - FEFE 3 SS2 A3 A1A1 - FEFE 4 SS2 A4 A1A1 - FEFE 5 SS2 A5 A1A1 - FEFE 6 SS2 A6 A1A1 - FEFE 7 SS2 A7 A1A1 - FEFE 8 SS2 A8 A1A1 - FEFE 9 SS2 A9 A1A1 - FEFE 10 SS2 AA A1A1 - FEFE 11 SS2 AB A1A1 - FEFE 12 SS2 AC A1A1 - FEFE 13 SS2 AD A1A1 - FEFE 14 SS2 AE A1A1 - FEFE 15 SS2 AF A1A1 - FEFE 16 SS2 B0 A1A1 - FEFE ------------------------------------------------------- Codeset Conversion The following codeset converter pairs are available for converting Traditional Chinese characters between eucTW and other encoding formats. Refer to iconv_intro(5) for an introduction to codeset conversion. For more information about the other codeset for which eucTW is the input or output, see the reference page specified in the list item. big5_eucTW, eucTW_big5 Converting from and to the Big-5 codeset: big5(5). Note that Big-5 encoding is equivalent to the Microsoft code-page format used on PCs for Traditional Chinese. You can therefore use this set of converters to convert Traditional Chinese text between the eucTW and PC code-page formats. For information about how the operating system supports PC code pages, see code_page(5). dechanyu_eucTW, eucTW_dechanyu Converting from and to the DEC Hanyu codeset: dechanyu(5). dechanzi_eucTW, eucTW_dechanzi Converting from and to the DEC Hanzi codeset: dechanzi(5). sbig5_eucTW, eucTW_sbig5 Converting from and to the Shift Big-5 codeset: sbig5(5). telecode_eucTW, eucTW_telecode Converting from and to the Telecode codeset: telecode(5). UCS-2_eucTW, eucTW_UCS-2 Converting from and to UCS-2 format: Unicode(5). UCS-4_eucTW, eucTW_UCS-4 Converting from and to UCS-4 format: Unicode(5). UTF-8_eucTW, eucTW_UTF-8 Converting from and to UTF--8 format: Unicode(5). Fonts for Taiwanese EUC For both display devices and printers, the operating system supports Taiwanese EUC through internal conversion to DEC Hanyu code and use of DEC Hanyu fonts (see dechanyu(5)). For general information on printing non-English text, refer to i18n_printing(5). SEE ALSO
Commands: locale(1) Others: ascii(5), big5(5), Chinese(5), code_page(5), dechanzi(5), GBK(5), iconv_intro(5), i18n_intro(5), i18n_printing(5), l10n_intro(5), sbig5(5), telecode(5), Unicode(5) eucTW(5)

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