Unicode control characters: Difference between revisions

Revision as of 02:49, 25 October 2023

Revision as of 15:37, 26 August 2024

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== Language tags ==

{{main|Tags (Unicode block)}}

Unicode previously includedincludes 128 characters, now deprecated, forpreviously intended as language tags. These characters essentially mirrored the 128 ASCII characters but were used to identify the subsequent text as belonging to a particular language according to [[BCP 47]]. For example, to indicate subsequent text as the variant of English as written in the United States, the sequence {{unichar|E0001|LANGUAGE TAG}}, {{unichar|E0065|Tag Latin Small Letter e}}, {{unichar|E006E|Tag Latin Small Letter n}}, {{unichar|E002D|Tag Hyphen-minus}}, {{unichar|E0075|Tag Latin Small Letter u}} and {{unichar|E0073|Tag Latin Small Letter s}} would have been used.

These language tag characters would not be displayed themselves. However, they would provide information for text processing or even for the display of other characters. For example, the display of Unihan ideographs might have substituted different glyphs if the language tags indicated Korean than if the tags indicated Japanese. Another example, might have influenced the display of decimal digits 0 through 9 differently depending on the language they appeared in.