None Value in Decomposition Type Unicode Property

None is the assigned value indicating that a character has no canonical or compatibility decomposition mapping. It signifies that the character is not composed of a sequence of other characters, nor does it have a format-specific expansion, such as a ligature, superscript, or fraction form. In effect, this value marks the character as a base or standalone unit within the textual system, meaning it cannot be algorithmically reduced to a simpler or alternate representation. For most common letters, digits, and punctuation, this is the default, while only specific symbols or precomposed forms carry a different value. When None applies, the character’s shape and identity are considered original, not derived from any other character combination.

This is the default value, shared by most characters (293,187 in total), so no character list is shown.