General Category - Nonspacing Mark
Nonspacing Mark is a category for characters that combine with a preceding base character without adding horizontal space, such as accents, diacritics, vowel signs, and other modifying marks. These characters are typically rendered as positioned above, below, or through the base glyph, altering its pronunciation, tone, or meaning in writing systems like Arabic, Hebrew, and Indic scripts. They are not used independently and do not advance the text cursor, meaning they overlay the base character’s occupied area. Common examples include the acute accent (´), the combining tilde (~), and the Hebrew niqqud points. In text processing, these marks are essential for correct display, searching, and sorting, as they affect how words are visually interpreted and linguistically processed, though they carry no standalone semantic value. Their behavior contrasts with spacing combining marks, which do add horizontal width.