Halfwidth and fullwidth forms: Difference between revisions

Revision as of 22:16, 13 November 2020

Revision as of 22:19, 13 November 2020

Line 17:

==In Unicode==

{{see also|Halfwidth and Fullwidth Forms (Unicode block)}}

For compatibility with existing character sets that contained both half- and fullwidth versions of the same character, [[Unicode]] allocated a single block at U+FF00–FFEF containing the necessary "alternative width" characters. This includes a fullwidth version of all the [[ASCII]] characters and some non-ASCII punctuation such as the Yen sign, halfwidth versions of katakana and [[hangul]], and halfwidth versions of some naturally squareother symbols such as circles. Only characters needed for lossless round trip to existing character sets were allocated, rather than (for instance) making a fullwidth version of every Latin accented character.

Unicode assigns ''every'' code point an "East Asian width" [[Unicode character property|property]]. This may be:<ref name="uax11">{{cite web|url=https://unicode.org/reports/tr11/|title=Unicode® Standard Annex #11: East Asian Width|last1=Lunde|first1=Ken|authorlink=Ken Lunde|publisher=[[Unicode Consortium]]|date=2019-01-25}}</ref>