U+089F "࢟" Arabic Half Madda over Madda Unicode Character

U+089F "࢟" Arabic Half Madda over Madda is a rarely used diacritical mark designed for historical and orthographic precision in Arabic script, specifically representing a shortened or half-length madda vowel sign superimposed over a full madda. This character was added to the Unicode Standard as part of the Arabic Extended-B block to support scholarly transcription and the accurate rendering of certain Quranic and classical texts where a combined notation of a half madda over a full madda is required. Unlike more common Arabic diacritics, it does not serve a function in modern standard Arabic but is essential for documenting subtle phonetic distinctions in ancient manuscripts and linguistic studies.