Decomposition Type - Vertical

Vertical is a classification used to indicate that a character has been canonically decomposed into a vertical presentation form, meaning its glyph is intended for vertical text layout, such as in traditional Chinese, Japanese, or Korean writing. This value applies to characters like certain punctuation marks, brackets, or small kana that possess a distinct vertical orientation variant, ensuring they render correctly when text flows top to bottom instead of horizontally. For example, a comma or parenthesis may have a visually rotated or repositioned shape in vertical context, and this decomposition type signals that the character’s standard form is replaced by that dedicated vertical version during text shaping. It helps maintain typographic consistency and readability in vertical scripts, distinguishing these special forms from ordinary, orientation neutral characters.