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'''Variation Selectors''' is a [[Unicode block]] containing 16 [[Variation Selectors|Variation Selector]] format. They are used to specify a specific glyph variant for a preceding character. They are currently used to specify standardized variation sequences for mathematical symbols, [[emoji]] symbols, [['Phags-pa script|'Phags-pa]] letters, and CJK unified ideographs corresponding to [[CJK compatibility ideographs]]. At present only standardized variation sequences with VS1, VS2, VS3, VS15 and VS16 have been defined; VS15 and VS16 are reserved to determine whether or not a character should be displayed as an [[emoji]].<ref>{{Cite web | title=StandardizedVariants.txt | url=https://www.unicode.org/Public/UCD/latest/ucd/StandardizedVariants.txt | publisher=Unicode Consortium | date=2015-11-20 | accessdate=2016-08-28 }}</ref>
These combining characters are named ''variation selector-1'' (for U+FE00) through to ''variation selector-16'' (U+FE0F), and are abbreviated VS1 – VS16. Each applies to the immediately preceding character.
As of Unicode 11.0:<ref name="UniStdVarTxt">{{Cite web|url=https://www.unicode.org/Public/UNIDATA/StandardizedVariants.txt|title=UCD: Standardized Variation Sequences|publisher=Unicode Consortium }}</ref>
* [[CJK Compatibility Ideographs|CJK compatibility ideograph]] variation sequences contain VS1–VS3 (U+FE00–U+FE02)
* [[CJK Unified Ideographs Extension A]] and [[CJK Unified Ideographs Extension B|B]] variation sequences contain VS1 (U+FE00) and VS2 (U+FE01)
* Emoji variation sequences contain VS16 (U+FE0F) for emoji-style (with color) or VS15 (U+FE0E) for text style (monochrome)
* [[Basic Latin (Unicode block)|Basic Latin]], [[Halfwidth and fullwidth forms|Halfwidth and Fullwidth Forms]], [[Manichaean (Unicode block)|Manichaean]], [[Myanmar (Unicode block)|Myanmar]], [[Myanmar Extended-A]], [[Phags-pa (Unicode block)|Phags-pa]], and mathematical variation sequences contain only VS1 (U+FE00)
* VS4–VS14 (U+FE03–U+FE0D) are not used for any variation sequences
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