This property defines the Decomposition Type of the Unicodes as Font specific Glyph
Characters like ℂ,ℊ,ℋ, etc. are listed under Font specific Glyph Decomposition Type.
1194 Characters are present in Font specific Glyph Decomposition Type starting with the Unicode point U+2102 that represents the character ℂ.
Currently, as per latest version 15.0.0, Unicode supports 18 number of Decomposition Type. Here are a few examples - Canonical Decomposition,Compatibility,Enclosing Mark, etc.