This property defines the Unicodes which belongs to Ogham block
Characters like ,ᚁ,ᚂ, etc. are listed under Ogham Block.
30 Characters are present in Ogham Block starting with the Unicode point U+1680 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.