2.2.3.3.1 Parent

If a ShapeSheet_Type element has a parent Shapes_Type element whose parent is a ShapeSheet_Type element, the shape specified by the latter ShapeSheet_Type element is called that shape’s parent.

If a ShapeSheet_Type element has an ancestor Shapes_Type element whose parent is a ShapeSheet_Type element, the shape specified by the latter ShapeSheet_Type element is called an ancestor shape of the shape specified by the former ShapeSheet_Type element.