SVGNumber appendItem(
    in SVGNumber item) raises(DOMException, SVGException); 

void clear() raises(DOMException); 

SVGNumber getItem(
    in unsigned long index) raises(DOMException); 

SVGNumber initialize(
    in SVGNumber item) raises(DOMException, SVGException); 

SVGNumber insertItemBefore(
    in SVGNumber item,
    in unsigned long index) raises(DOMException, SVGException); 

SVGNumber removeItem(
    in unsigned long index) raises(DOMException); 

SVGNumber replaceItem(
    in SVGNumber item,
    in unsigned long index) raises(DOMException, SVGException); 

readonly attribute unsigned long numberOfItems;