Decomposition Type - Circle
Circle is a value indicating that a character has been formally decomposed into a base form combined with a surrounding circular enclosure, such as a circled letter, number, or symbol. This decomposition type is applied when the original character is visually presented as a base glyph enclosed by a circle, often for stylistic or notation purposes, and the decomposition provides a standard mapping to the unadorned base character plus a combining enclosing circle. The value helps in normalization and search by allowing software to treat the circled form as equivalent to its plain counterpart, while preserving the original presentation when needed. It does not cover all circle-like characters, only those with an explicit canonical or compatibility decomposition of this specific shape.