[14] [[Unicode]] の[[特性]] [DFN[[CODE[[[White_Space]]]]]] は、[[空白文字]]を表します。

* 仕様書

[REFS[
- [12] [CITE@en-us[UAX #44: Unicode Character Database]] ([TIME[2010-10-09 06:36:55 +09:00]] 版) <http://www.unicode.org/reports/tr44/#White_Space>
]REFS]

* 文字の一覧

[REFS[
- [13] [CITE@en[Character set "$unicode:White_Space"]] ([TIME[2013-11-02 08:10:57 +09:00]] 版) <http://chars.suikawiki.org/set?expr=%24unicode%3AWhite_Space>
]REFS]

* メモ

[1] [CITE@en-us[Unicode Character Database]] ([TIME[2008-03-26 03:06:22 +09:00]] 版) <http://unicode.org/Public/UNIDATA/UCD.html#White_Space>

[2] [CITE[PropList-5.1.0.txt]] ([TIME[2008-03-21 06:31:08 +09:00]] 版) <http://unicode.org/Public/5.1.0/ucd/PropList.txt>

[PRE[
0009..000D    ; White_Space # Cc   [5] <control-0009>..<control-000D>
0020          ; White_Space # Zs       SPACE
0085          ; White_Space # Cc       <control-0085>
00A0          ; White_Space # Zs       NO-BREAK SPACE
1680          ; White_Space # Zs       OGHAM SPACE MARK
180E          ; White_Space # Zs       MONGOLIAN VOWEL SEPARATOR
2000..200A    ; White_Space # Zs  [11] EN QUAD..HAIR SPACE
2028          ; White_Space # Zl       LINE SEPARATOR
2029          ; White_Space # Zp       PARAGRAPH SEPARATOR
202F          ; White_Space # Zs       NARROW NO-BREAK SPACE
205F          ; White_Space # Zs       MEDIUM MATHEMATICAL SPACE
3000          ; White_Space # Zs       IDEOGRAPHIC SPACE
]PRE]

[3] [[Zs]] と比べると、
- [[U+0009]]~[[U+000D]] が入ってる
- [[U+0085]] が入ってる
- [[U+0028]]、[[U+2029]] が入ってる

[4] 将来にわたって [[Zs]] の[[超集合]]であることが保証されているのかは謎。

[REFS[
- [15] [CITE@en[Compare character sets "$unicode:Zs" and "$unicode:White_Space"]] ([TIME[2013-11-02 08:14:33 +09:00]] 版) <http://chars.suikawiki.org/set/compare?expr1=%24unicode%3AZs&expr2=%24unicode%3AWhite_Space>
]REFS]


[6] [CITE@en[Redefine WSP as White_Space characters from the HTML 5 spec. · w3c/webappsec-subresource-integrity@6a692bf]]
([TIME[2015-10-28 11:10:45 +09:00]] 版)
<https://github.com/w3c/webappsec-subresource-integrity/commit/6a692bf71eac98d454f5532eb68c63a2cd69d544>

[7] [CITE@en[Stop using White_Space]]
([[annevk]]著, [TIME[2019-08-30 16:18:30 +09:00]])
<https://github.com/whatwg/html/commit/635a59996c72044852306e89a88b68536a2781d8>

[8] [CITE@en[Should the 'empty cell' definition ignore Default_ignoreable code points? · Issue #4854 · whatwg/html]]
([TIME[2020-07-13 12:58:12 +09:00]])
<https://github.com/whatwg/html/issues/4854>

[9] [CITE@en[Stop using White_Space by annevk · Pull Request #4860 · whatwg/html]]
([TIME[2020-07-13 12:58:35 +09:00]])
<https://github.com/whatwg/html/pull/4860>