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[6] 
[[文字列]]をある[[文字コード]]から他の[[文字コード]]に[[変換]]することを、
一般には[DFN[文字コード変換]]といいます。

* 転符号化

[4] [[文字列]]をある[[文字コード]]から他の[[文字コード]]に[[変換]]することを、
[DFN[[RUBYB[転符号化]@en[transcode]]]]といいます。
[[転符号化]]する[[ソフトウェア部品]]を、
[DFN[[RUBYB[転符号化器]@en[transcoder]]]]といいます。[SRC[>>1]]

[5] あまりメジャーな語ではありません。

[FIG(quote)[
[FIGCAPTION[
[1] 
[CITE@en[[[RFC 3536]] - Terminology Used in Internationalization in the IETF]] ([TIME[2011-01-29 02:14:52 +09:00]] 版) <http://tools.ietf.org/html/rfc3536#page-6>
]FIGCAPTION]

>       Transcoding is the process of converting text data from one
character encoding form to another.  Transcoders work only at the
level of character encoding and do not parse the text.  Note:
Transcoding may involve one-to-one, many-to-one, one-to-many or
many-to-many mappings.  Because some legacy mappings are glyphic,
they may not only be many-to-many, but also discontinuous: thus
XYZ may map to yxz.  <CHARMOD>
>      In this definition, "many-to-one" means a sequence of characters
mapped to a single character.  The "many" does not mean
alternative characters that map to the single character.
]FIG]

[2] [CITE@en[RFC 6365 - Terminology Used in Internationalization in the IETF]]
([TIME[2011-09-10 19:11:51 +09:00]] 版)
<http://tools.ietf.org/html/rfc6365#page-7>

[3] [CITE@en[Character Model for the World Wide Web 1.0: Fundamentals]]
( ([TIME[2005-02-15 14:24:00 +09:00]] 版))
<http://www.w3.org/TR/charmod/#sec-Transcoding>

* 変換用の写像表

[35] 
[CITE@en[CodepageEncoder/data/encodings at main · NielsLeenheer/CodepageEncoder · GitHub]], [TIME[2025-05-23T15:52:48.000Z]] <https://github.com/NielsLeenheer/CodepageEncoder/tree/main/data/encodings>

-[36] [CITE@en[icu/icu4c/source/data/mappings at main · unicode-org/icu · GitHub]], [TIME[2025-05-29T12:29:56.000Z]] <https://github.com/unicode-org/icu/tree/main/icu4c/source/data/mappings>
-[37] [CITE@en[icu-data/charset at main · unicode-org/icu-data · GitHub]], [TIME[2025-05-31T11:52:53.000Z]] <https://github.com/unicode-org/icu-data/tree/main/charset>
- [38] [CITE@ja[ICU - International Components for Unicode - Character Set Mapping Tables]], [TIME[2025-05-31T11:53:44.000Z]] <https://icu.unicode.org/charts/charset>

[39] [CITE[Evertype: Unicode Mapping Tables]], [TIME[2006-01-01T14:10:51.000Z]], [TIME[2025-06-06T14:32:00.732Z]] <https://www.evertype.com/standards/mappings/>

[40] 
[CITE@en-US[sourceware.org Git - glibc.git/tree - iconvdata/]], [TIME[2025-06-25T13:02:45.000Z]] <https://sourceware.org/git/?p=glibc.git;a=tree;f=iconvdata;h=494f8c50b9c9662ae85bf56184db943b0526e12c;hb=b2a8d19f4adc8ca22394b02c144b4bc867adc804>

[10] [CITE@ja[xorg / font / encodings · GitLab]], [TIME[2025-09-12T10:22:04.000Z]] <https://gitlab.freedesktop.org/xorg/font/encodings>

-[11] [CITE@en[xterm-snapshots/charsets.dat at master · xterm-x11/xterm-snapshots · GitHub]], [TIME[2025-09-12T10:30:35.000Z]] <https://github.com/xterm-x11/xterm-snapshots/blob/master/charsets.dat>
--[12] [CITE@en[xterm-snapshots/charsets.h at master · xterm-x11/xterm-snapshots · GitHub]], [TIME[2025-09-12T10:31:19.000Z]] <https://github.com/xterm-x11/xterm-snapshots/blob/master/charsets.h>

** Unicode Consortium の変換表

[8] 当初は [[FTP]] 配布 [SEE[ [[Unicode Consortium]] ]]

[20] [CITE[General Questions about Chararcter Mappings]], [TIME[2025-06-30T04:33:44.000Z]], [TIME[1997-01-05T19:42:04.261Z]] <https://web.archive.org/web/19970105193228/http://stonehand.com:80/unicode/faq/mappings/general.html>

[21] 
[CITE[Questions about Mapping Tables]], [TIME[2025-06-30T04:34:20.000Z]], [TIME[1997-01-05T19:42:29.061Z]] <https://web.archive.org/web/19970105193219/http://stonehand.com:80/unicode/faq/mappings/tables.html>

** [CITE[Encoding Standard]] の変換表

[SEE[ [[Encoding Standard]] ]]

** [CITE[TECkit]] の [CODE[.map]] ファイル

[SEE[ [CODE[.map]] ]]

* 実装

[9] [CITE[[[TECkit]]]]

* 関連

[7] [[変形]], [[符号化]]、[[復号]], [[文字コード判定]],
[[文字コードの修復]]

* メモ

- [30] [CITE[telecode(5)]], [TIME[1998-10-14T23:29:58.000Z]], [TIME[2022-05-03T03:38:56.992Z]] <http://www2.phys.canterbury.ac.nz/dept/docs/manuals/unix/DEC_4.0e_Docs/HTML/MAN/MAN5/0330____.HTM>
- [31] [CITE[Microsoft Word - Chinawrd.doc - CHINPRN.PDF]], [TIME[1999-06-21T12:00:00.000Z]], [TIME[2022-05-03T06:55:10.367Z]] <http://www2.phys.canterbury.ac.nz/dept/docs/manuals/unix/DEC_5.0a_Docs/ACRO_SUP/CHINPRN.PDF#page=33>

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