GB18030 man page on OSF1

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GB18030(5)							    GB18030(5)

NAME
       GB18030, gb18030 - A Chinese character set that extends GBK by means of
       4-byte code points

DESCRIPTION
       The GB18030-2000 character set, defined by the Chinese  national	 stan‐
       dard  organization,  is	an  extension  of the GBK character set, which
       itself is an extension to the GB2312-80 character set. (See the	GBK(5)
       reference page.)

       GB18030 incorporates GBK support for all the Hanzi characters specified
       by the Unicode Version 3.0 and ISO/IEC 10646-2001 standards.

   GB18030 Code Space and Code Points
       The GB18030 character set has 1-byte, 2-byte, and 4-byte encoding  with
       the following structure:

       ─────────────────────────────────────────────────────────────────
       Number of Bytes	 Code Space		      Total Code Points
       ─────────────────────────────────────────────────────────────────
       1-byte		 0x00 to 0x7F		      128
       2-byte		 0x81 to 0xFE		      23940
			 0x40 to 0xFE (except 0x7F)
       4-byte		 0x81 to 0xFE		      1587600
			 0x30 to 0x39
			 0x81 to 0xFE
			 0x30 to 0x39
       ─────────────────────────────────────────────────────────────────

       The  GB18030  1-byte  code  provides support for ASCII. The 2-byte code
       provides support for all the CJK	 characters  (Chinese,	Japanese,  and
       Korean)	defined	 in the Unicode 2.1 standard. The 4-byte code provides
       support for the Unicode Version	3.0  additions	to  Version  2.1.  The
       4-byte  code  also  leaves a large number of unassigned codepoints that
       are available for future use.

       The GB18030 character set maps the invalid  Unicode  codepoints	U+FFFE
       and U+FFFF to 4-byte codes. Because these two characters are invalid in
       UCS, this mapping can cause problems with round-trip character  conver‐
       sions.

       The  GB18030  character set does no mapping from 4-byte code to the UCS
       surrogate area (U+D800 through U+DFFF).

   Codeset Converters for GB18030
       The following codeset converter pairs are available for converting Sim‐
       plified	Chinese	 characters  between GB18030 and UCS formats. Refer to
       Unicode(5) for more information about  the  UTF-16,  UCS-4,  and	 UTF-8
       encoding	 formats. Refer to iconv_intro(5) for an introduction to code‐
       set conversion.	UTF-16_GB18030, GB18030_UTF-16

	      Converting   from	  and	to   UTF-16   format	UCS-4_GB18030,
	      GB18030_UCS-4

	      Converting from and to UCS-4 format UTF-8_GB18030, GB18030_UTF-8

	      Converting from and to UTF-8 format

   Fonts for GB18030
       The operating system provides the following Simplified Chinese TrueType
       fonts	  for	    GB18030:	   -css_dongwen-fangsong-medium-r-nor‐
       mal--0-0-0-0-c-0-iso8859-1	   -css_dongwen-fangsong-medium-r-nor‐
       mal--0-0-0-0-c-0-iso10646-1

       -css_dongwen-heiti-medium-r-normal--0-0-0-0-c-0-iso8859-1 -css_dongwen-
       heiti-medium-r-normal--0-0-0-0-c-0-iso10646-1

       -css_dongwen-kaiti-medium-r-normal--0-0-0-0-c-0-iso8859-1 -css_dongwen-
       kaiti-medium-r-normal--0-0-0-0-c-0-iso10646-1

       -css_dongwen-songti-medium-r-normal--0-0-0-0-c-0-iso8859-1   -css_dong‐
       wen-songti-medium-r-normal--0-0-0-0-c-0-iso10646-1

       These  fonts  can  be used for printing with Chinese text printers. The
       operating system uses Unicode fonts and the SongTi font	style  as  the
       default screen font for the GB18030 codeset. See wwpsof(8) for informa‐
       tion on the PostScript print filter and TrueType fonts.

SEE ALSO
       Commands: locale(1)

       Others:	ascii(5),  big5(5),  Chinese(5),   dechanyu(5),	  dechanzi(5),
       eucTW(5),   GBK(5),   i18n_intro(5),  i18n_printing(5),	l10n_intro(5),
       sbig5(5), telecode(5)

								    GB18030(5)
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