2.2.3.3.3 Subshape

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

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