This property defines the Unicodes which belongs to Ideographic Description Characters block
Characters like ⿰,⿱,⿲, etc. are listed under Ideographic Description Characters Block.
13 Characters are present in Ideographic Description Characters Block starting with the Unicode point U+2FF0 that represents the character ⿰.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.