Decomposition Type - Isolated
Isolated is a value indicating that a character should be treated as a standalone unit in decomposition, meaning it has no inherent compatibility mapping to another sequence, but rather exists as an independent form, often used for symbols or letters that are not intended to be combined or normalized into a different presentation. This value appears when a character’s decomposition type is marked as isolated, signifying that its visual or semantic identity does not rely on being transformed into a base character plus combining marks, and that algorithms should preserve it exactly as encoded. In practice, this helps distinguish such characters from those with other decomposition behaviors, ensuring they are not altered during text normalization, yet the value itself does not provide a specific replacement string, only the classification of its standalone nature.