This property defines the Unicodes which belongs to Early Dynastic Cuneiform block
Characters like 𒒀,𒒁,𒒂, etc. are listed under Early Dynastic Cuneiform Block.
197 Characters are present in Early Dynastic Cuneiform Block starting with the Unicode point U+12480 that represents the character 𒒀.
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.