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637.txt
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[22] [[Unicode]] の[DFN[[RUBYB[私用域]@en[private use area]]]]は、
[[Unicode Standard]] で特定の[[意味]]が規定されず、
[[利用者]]等が用途を定めることができる[[符号位置]]群です。
* 用法
[7] 他の[[文字コード]]との[[変換表]]で対応関係が規定されている場合、
実装者が内部的に用いる場合、
実装者が規定して[[利用者]]に提供する場合、
[[フォント]]が規定して[[利用者]]に提供する場合、
[[利用者]]が自ら規定して用いる場合があります。
[12] その性質上、[[相互運用性]]はまったく期待できません。
書き捨ての[[文書]]など例外的な場合を除き、使うべきではありません。
また他の誰がどのような用途で用いているかわかりませんから、
内部処理用にも使うべきではありません。
* 関連
[23] [[Unicode]] 以前の[[文字コード]]やその実装にも、
[[外字]]、[[EUDC]]、[[自由領域]]といった呼称で同様の[[符号位置]]・[[ビット組合せ]]が用意されていたり、
[[空き領域]]を実装が勝手に使ったりしていました。
* 利用例
[26] [[文字符号化]] [[x-user-defined]] は、
[ [[U+F780]], [[U+F7FF]] ] を [ [N[0x80]], [N[0xFF]] ] と対応付けています。
[1]
[CITE[Emacs VietThai environment]] <http://www.m17n.org/vietthai/forEmacs.html>
> As the proposal for VietThai script to the Unicode is still in progress, we use the Private Use Area for VietThai characters (U+F000..U+F07E). A VietThai font encoded accordingly is also available in the package.
[2] [CITE[Special filenames]]
( ([TIME[2011-03-01 18:26:29 +09:00]] 版))
<http://www.cygwin.com/cygwin-ug-net/using-specialnames.html>
[3] [CITE@en[Private Use (Unicode) - Wikipedia, the free encyclopedia]]
( ([TIME[2012-03-04 20:44:51 +09:00]] 版))
<http://en.wikipedia.org/wiki/Private_Use_(Unicode)#Example_code_point_U.2BF8FF>
[4] [CITE@en[Bug 16862 – Indexes: GB18030 and Microsoft encodings should support PUA code points]]
( ([TIME[2013-10-27 03:50:39 +09:00]] 版))
<https://www.w3.org/Bugs/Public/show_bug.cgi?id=16862>
[5] [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-PrivateUse>
[6] [CITE@en[1054817 – Icon fonts don't work when "allow pages to choose their own fonts" is unchecked]]
( ([TIME[2014-08-18 02:20:12 +09:00]] 版))
<https://bugzilla.mozilla.org/show_bug.cgi?id=1054817>
[8] [CITE@en[789788 – Not allowing pages to choose their own fonts breaks with icon fonts]]
( ([TIME[2014-08-19 05:33:45 +09:00]] 版))
<https://bugzilla.mozilla.org/show_bug.cgi?id=789788>
[9] [CITE[JsonWireProtocol - selenium - A description of the protocol used by WebDriver to communicate with remote instances - Browser automation framework - Google Project Hosting]]
( ([TIME[2014-10-30 06:29:12 +09:00]] 版))
<https://code.google.com/p/selenium/wiki/JsonWireProtocol#/session/:sessionId/element/:id/value>
[10] [CITE@ja[5-1a. 錦明朝かな(明朝体フォント)]]
( ([TIME[2014-04-19 11:30:08 +09:00]] 版))
<http://www.akenotsuki.com/eyeben/font/nishiki_kana.html#knownissue>
[11] [CITE@en[WebDriver]]
( ([TIME[2014-11-07 11:12:19 +09:00]] 版))
<https://dvcs.w3.org/hg/webdriver/raw-file/default/webdriver-spec.html#character-types>
[13] ([TIME[2005-04-05 10:04:12 +09:00]] 版)
<http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/CORPCHAR.TXT>
[14] [CITE[Ligature Symbols]]
([[Kazuyuki Motoyama]] 著, [TIME[2013-01-31 04:13:14 +09:00]] 版)
<http://kudakurage.com/ligature_symbols/>
[FIG(quote)[
[FIGCAPTION[
[15] [CITE@en[w3c/smufl]]
([TIME[2015-08-31 11:42:29 +09:00]] 版)
<https://github.com/w3c/smufl>
]FIGCAPTION]
> SMuFL is a specification that provides a standard way of mapping the thousands of musical symbols required by conventional music notation into the Private Use Area in Unicode’s Basic Multilingual Plane for a single (format-independent) font.
]FIG]
[FIG(quote)[
[FIGCAPTION[
[16] ([TIME[2010-09-30 17:02:10 +09:00]] 版)
<http://www.arib.or.jp/english/html/overview/doc/2-STD-B24v5_1-1p3.pdf#page=156>
]FIGCAPTION]
> DRCS の文字は、基本多言語面の私用領域に対応付ける。
> 私用領域の利用にあたっては、DRCS は EC 区 00 点から順次用いることとする。
]FIG]
[FIG(quote)[
[FIGCAPTION[
[17] ([TIME[2016-03-21 12:19:02 +09:00]] 版)
<http://247dieter.com/>
]FIGCAPTION]
> <input type="text" placeholder="気になるワードを入力" value="" name="s" id="s" />
> <button type="submit" id="searchsubmit"></button>
;; [[フォント]]指定で [[Font Awesome]] ([[虫眼鏡]]アイコン)
]FIG]
[FIG(quote)[
[FIGCAPTION[
[18] [CITE[FORUM21]]
([TIME[2006-03-08 17:20:56 +09:00]] 版)
<http://www.forum21.jp/contents/contents6-15.html>
]FIGCAPTION]
> バットは920で、プロ選手のなかでも重い方なんですよ。
]FIG]
[19] [CITE@en[WebKit on Twitter: "The Pay JS code has landed in open source. https://t.co/AJfKFtdKxy"]]
([TIME[2016-06-26 12:48:01 +09:00]])
<https://twitter.com/webkit/status/746441587811508227>
[FIG(quote)[
[FIGCAPTION[
[20] [CITE@en[Basic message formatting | Slack]]
([[Slack]]著, [TIME[2016-07-13 00:57:54 +09:00]])
<https://api.slack.com/docs/message-formatting>
]FIGCAPTION]
> The Slack message server and API handle conversion from several binary emoji formats - the Unicode Unified format (used by OSX 10.7+ and iOS 6+), the Softbank format (used by iOS 5) and the Google format (used by some Android devices). These Unicode code points will be converted into their colon-format equivalents.
]FIG]
[21] [CITE@en[RFC 1345 - Character Mnemonics and Character Sets]]
([TIME[2016-07-13 09:31:02 +09:00]])
<https://tools.ietf.org/html/rfc1345#page-40>
[FIG(quote)[
[FIGCAPTION[
[24] [CITE@en[XForms 2.0 - XForms Users Community Group]]
([TIME[2016-12-11 09:41:21 +09:00]])
<https://www.w3.org/community/xformsusers/wiki/XForms_2.0#External_JSON_values>
]FIGCAPTION]
> The content of a string is copied across. Escaped characters are transformed as necessary; characters and escapes that have no equivalent XML character (\b, \f, and characters of the form \uxxxx less than \u0020, except for \u0009, \u000A, and \u000D) are transformed by adding \uE000 to them.
]FIG]
[25] [CITE@en[Remove the last 14 characters PUA of GB18030-2005 · Issue #27 · whatwg/encoding]]
([TIME[2016-12-20 20:28:47 +09:00]])
<https://github.com/whatwg/encoding/issues/27>
[FIG(quote)[
[FIGCAPTION[
[27] [CITE[Bogus Shift_JIS]]
([TIME[2017-05-03 16:11:15 +09:00]])
<https://hsivonen.com/test/moz/bogus_shift_jis.htm>
]FIGCAPTION]
> IE6 had the following behaviors:
> The bytes 0xFD, 0xFE and 0xFF decode to U+F8F1, U+F8F2 and U+F8F3, respectively.
]FIG]
[28] [CITE@en[remove Gecko quirks from shift_jis]]
([[annevk]]著, [TIME[2012-04-09 17:25:02 +09:00]])
<https://github.com/whatwg/encoding/commit/651f672ee988702da03f56ad8bdfda00b51a21ea>
[29] [CITE@en[bug 6180 – EUDC (外字) が表示されない]]
( ([TIME[2014-12-19 18:17:50 +09:00]] 版))
<http://bugzilla.mozilla.gr.jp/show_bug.cgi?id=6180>
[30] [CITE@en[399369 – Disable font fallback when a character is in the private use areas]]
( ([TIME[2014-12-19 18:18:16 +09:00]] 版))
<https://bugzilla.mozilla.org/show_bug.cgi?id=399369>
[31] [CITE@en[Comments on XML Part 1 from Japanese experts]]
([[Murata Makoto]]著, [TIME[1997-05-28 10:48:56 +09:00]])
<https://lists.w3.org/Archives/Public/w3c-sgml-wg/1997May/0612.html>