This property defines the Unicodes which are Leading Vowel Jamo Hangul Syllable Type
Characters like 가,개,갸, etc. are listed under Leading Vowel Jamo Hangul Syllable Type.
399 Characters are present in Leading Vowel Jamo Hangul Syllable Type starting with the Unicode point U+AC00 that represents the character 가.
Currently, as per latest version 15.0.0, Unicode supports 5 number of Hangul Syllable Type. Here are a few examples - Leading Jamo,Leading Vowel Jamo,Leading Vowel Trailing Jamo, etc.