Variation Selector-199

It requests a registered glyph variant for the preceding Han character.

Han characters are used in Chinese and also in Japanese and Korean writing; a glyph is the drawn shape a font displays. VS199 is not read aloud: it works only as the second half of a registered ideographic variation sequence (IVS), a base-character-plus-selector pair.

The requested shape depends on the registered pair and font support. If the base character has no matching registered sequence, or the font cannot display the pair, the character appears in its usual shape.

Why was Variation Selector-199 created?

It preserves a glyph choice without adding a new character.

Variation selectors developed as a text-encoding way to request a specific glyph while keeping a usable base-character fallback. Unicode's early design documents from 2000–2003 describe the mechanism; the supplementary selectors are used in ideographic variation sequences, whose registered pair—not the selector number alone—identifies the variant.

The Unicode Ideographic Variation Database (IVD) links sequences to font collections and their glyph variants. One Japanese example is Adobe-Japan1, a collection built around Japanese Industrial Standards character sets and their variants; it was first registered in the IVD on 2007-12-14.