Objects from the Class
Objects can be created by calls of the form Community.Extends
Class "DataFrame", directly.
Class "DataTable", by class "DataFrame", distance 2.
Class "SimpleList", by class "DataFrame", distance 2.
Class "DataTableORNULL", by class "DataFrame", distance 3.
Class "List", by class "DataFrame", distance 3.
Class "Vector", by class "DataFrame", distance 4.
Class "Annotated", by class "DataFrame", distance 5.