For example, according to This ECMAXML, M:Microsoft.JScript.IEngine2.Clone(System.AppDomain) is only in Microsoft.Jscript 10.0.0.0. However if you search in FrameworkIndex file, you can find this doc id in every .NET Framework version from 1.1 to 4.8, which means its assembly version should at least include 7.0.5000.0 and 8.0.0.0, just like its parent type.